i The Direct Answer
California’s outdoor heat illness prevention standard — Title 8, California Code of Regulations, Section 3395 — requires all California employers with outdoor workplaces to provide fresh, cool drinking water (at least one quart per employee per hour), shade when temperatures exceed 80°F, and emergency response procedures at all times. When temperatures reach or exceed 95°F, employers in five designated high-heat industries must implement additional high-heat procedures including pre-shift meetings, supervisor observation, and mandatory cool-down rests for agricultural workers.
Section 3395 is a fully enforceable, currently operative California state law — not a proposal. Employers who fail to comply face serious violations of up to $25,000 per violation and willful violations of up to $158,727 per violation. Cal/OSHA issued its first willful heat violation citation in December 2024, imposing $276,425 on a single employer for failing to provide water, shade, and training.
An additional development: Cal/OSHA released a revised discussion draft on August 14, 2026 proposing significant amendments to §3395 under Assembly Bill 2243 — including expanding high-heat procedures to all outdoor industries (not just the current five) and new HIPP distribution requirements. As of September 1, 2026, the draft is open for stakeholder comment through September 21, 2026. This article explains the current enforceable standard and the proposed changes side by side.
⚠ Cal/OSHA Heat Enforcement in 2026: What Every California Employer Must Know
California’s outdoor heat standard (§3395) has been in effect since 2005, last amended in 2015. It applies to all outdoor places of employment in California — there is no de minimis size exemption.
On December 12, 2024, Cal/OSHA issued its first willful heat violation citation in more than five years: $276,425 against Parkwood Landscape Maintenance (Van Nuys) for deliberately failing to provide water, shade, and training to outdoor workers in temperatures exceeding 95°F. The investigation began when an employee complaint was filed. The employer had a prior heat citation from 2022.
California has no federal counterpart. The proposed federal OSHA heat rule has stalled under the current administration. California employers cannot wait for a federal standard — they are governed by §3395 now, with penalties that exceed the federal maximum.
Penalty schedule (effective January 1, 2024): Serious violations — up to $25,000 per violation. Willful and Repeat violations — up to $158,727 per violation, minimum $11,337. General violations — up to $15,873 per violation.
An August 14, 2026 revised discussion draft proposes significant expansions to §3395. Public comment closes September 21, 2026. The current §3395 remains operative.
Section 3395 Scope and Coverage: Who Must Comply
California Code of Regulations, Title 8, Section 3395 — formally known as the Maria Isabel Vasquez Jimenez heat illness standard — applies to all outdoor places of employment in California. There is no minimum size threshold. A single-employee landscaping operation is subject to the same standard as a 5,000-worker agricultural employer.
The standard is organized around a two-tier structure: a baseline set of requirements that apply to all outdoor employers, and an additional set of high-heat procedures (subsection (e)) that apply only to employers in five specifically enumerated industries when temperatures reach 95°F.
Five Industries Subject to All §3395 Requirements Including High-Heat Procedures
The following industries must comply with all provisions of §3395, including the 95°F high-heat procedures in subsection (e):
- Agriculture
- Construction
- Landscaping
- Oil and gas extraction
- Transportation or delivery of agricultural products, construction materials, or other heavy materials (furniture, lumber, freight, cargo, cabinets, industrial or commercial materials) — except for employment consisting solely of operating an air-conditioned vehicle without loading or unloading
All other outdoor employers are subject to the baseline §3395 requirements (water, shade, emergency response, acclimatization, training, and the written Heat Illness Prevention Plan) but are not currently required to implement the 95°F high-heat procedures unless they fall into one of the five enumerated industries.
! Proposed Change: High-Heat Procedures for All Outdoor Employers
The August 14, 2026 revised discussion draft proposes eliminating the industry-specific limitation on high-heat procedures. Under the proposed language, every outdoor employer — regardless of industry — would be required to implement high-heat procedures when temperatures reach 95°F.
This is the most significant operational change in the proposed rulemaking. If finalized, it would extend the pre-shift meeting, observation, and communication requirements currently limited to five industries to all California outdoor employers. Public comment on this proposal is open through September 21, 2026.
Requirement 1: Water — The Specific Quantity Mandate
Section 3395(c) requires that employees have access to potable drinking water that is fresh, pure, suitably cool, and free of charge. The water must be located as close as practicable to the areas where employees are working. The quantity requirement is specific:
◆ Verbatim Regulatory Text — §3395(c) Water
‘Where drinking water is not plumbed or otherwise continuously supplied, it shall be provided in sufficient quantity at the beginning of the work shift to provide one quart per employee per hour for drinking for the entire shift. Employers may begin the shift with smaller quantities of water if they have effective procedures for replenishment during the shift as needed to allow employees to drink one quart or more per hour.’
Three practical compliance points that the Parkwood citation makes explicit:
- Employees may never be required to purchase their own drinking water. Parkwood employees were reportedly purchasing their own water — a direct violation. The water is at the employer’s expense.
- The one-quart-per-employee-per-hour standard is a minimum. In high-heat conditions, workers may consume significantly more. The training provisions (§3395(h)(1)(C)) additionally require employers to encourage frequent consumption of small quantities of water — up to 4 cups per hour.
- Water must be located as close as practicable to the work area. A single cooler at a distant construction trailer does not satisfy this requirement when workers are spread across a large site.
Requirement 2: Shade — The 80°F Trigger and the Preventative Cool-Down Rest
Section 3395(d) establishes a two-tier shade requirement organized around the 80°F temperature threshold:
| Temperature / Condition | Shade Requirement |
| Temperature < 80°F | Shade must be available upon an employee’s request. Employers do not need to maintain continuous shade — but they must provide timely access when a worker requests it. |
| Temperature ≥ 80°F | Shade must be present continuously while employees are working. The amount of shade must accommodate all employees on rest or recovery periods, allowing them to sit in normal posture fully in the shade without physical contact with each other. |
| All temperatures | Employees must be allowed and encouraged to take a preventative cool-down rest in the shade whenever they feel the need to protect themselves from overheating. A worker taking a preventative cool-down rest must be: (a) monitored and asked if they are experiencing heat illness symptoms; (b) encouraged to remain in the shade; (c) not ordered back to work until symptoms abate — and in no event less than 5 minutes after accessing the shade. |
The definition of ‘shade’ in §3395(b) is specific: blockage of direct sunlight sufficient that objects do not cast a shadow in the shaded area. A car parked in the sun does not constitute shade even if workers sit inside it — unless the vehicle is running with air conditioning. Shade may be natural (tree canopy) or artificial (tarps, canopies, shade structures) as long as it does not expose employees to unsafe conditions.
Two exceptions exist: employers who can demonstrate that maintaining a shade structure is infeasible or unsafe may use alternative procedures providing equivalent protection. Non-agricultural employers may substitute cooling measures such as misting machines if they can demonstrate equivalent effectiveness.
Requirement 3: High-Heat Procedures — What Happens at 95°F
When temperatures at the worksite equal or exceed 95°F, employers in the five enumerated industries must implement all of the following high-heat procedures under §3395(e):
- Effective two-way communication: ensure workers can contact a supervisor by voice, observation, or electronic means. An electronic device such as a cell phone may be used only if reception in the area is reliable.
- Employee observation: observe all employees for alertness and signs or symptoms of heat illness. Acceptable methods include: supervisor or designee observation of 20 or fewer employees; mandatory buddy system; regular communication with sole workers by radio or cell phone; or other effective means.
- Designated emergency contact: designate one or more employees on each worksite as authorized to call emergency medical services, and allow other employees to call emergency services when no designated employee is available.
- Water reminders throughout the shift: remind employees to drink water regularly — do not assume they will drink on their own.
- Pre-shift meetings before each shift: review the high-heat procedures, encourage water consumption, and remind employees of their right to take a cool-down rest.
- Agriculture only — mandatory cool-down rest: when temperatures reach 95°F or above, agricultural employers must ensure employees take a minimum 10-minute net preventative cool-down rest period every two hours. This may be concurrent with other required meal or rest periods if the timing coincides.
→ How cyclonePORT Supports 95°F High-Heat Protocol Activation
The 95°F high-heat threshold is not an announcement — it is an operational trigger. Every supervisor on every active worksite must know the moment temperature reaches 95°F to implement pre-shift meetings, activate the buddy system or observation protocol, and begin water reminders.
cyclonePORT’s on-site temperature monitoring delivers simultaneous push alerts to all registered supervisors via the RadarOmega app the instant the 95°F threshold is crossed at the actual work location — not at the nearest airport sensor, which may be miles away and reading meaningfully different conditions.
The automatic timestamped log documents the exact time the 95°F threshold was reached and when alerts were delivered — creating the compliance record Cal/OSHA will request in any investigation.
Requirement 4: Emergency Response Procedures
Section 3395(f) requires effective emergency response procedures at all times — not only in high-heat conditions. The emergency response obligations include:
- Maintaining effective communication so workers can contact a supervisor or emergency medical services when necessary
- Responding to signs and symptoms of heat illness with first aid measures and emergency medical services as needed
- Critical response standard: if any signs or symptoms of severe heat illness are observed — decreased level of consciousness, staggering, vomiting, disorientation, irrational behavior, or convulsions — the employer must implement emergency response procedures immediately. An employee showing these signs shall not be left alone or sent home without being offered on-site first aid and/or emergency medical services.
- Maintaining clear and precise directions to the worksite so emergency responders can be directed efficiently
⚠ Never Leave a Heat Illness Victim Unmonitored
The regulation is specific: ‘An employee exhibiting signs or symptoms of heat illness shall be monitored and shall not be left alone or sent home without being offered onsite first aid and/or being provided with emergency medical services.’
Sending a worker home to ‘rest’ after they exhibit heat illness symptoms is a §3395(f) violation. The worker must be monitored until they have received appropriate first aid or emergency services — and only a medical provider should authorize them to leave.
Requirement 5: Acclimatization — The 14-Day Rule and Heat Wave Protocol
Section 3395(g) establishes two distinct acclimatization requirements:
Newly Assigned Employees
An employee who has been newly assigned to a high-heat work area must be closely observed by a supervisor or designee for the first 14 days of employment. The regulation does not prescribe a specific graduated exposure schedule — the requirement is close observation throughout the 14-day window.
Heat Wave Protocol
All employees must be closely observed by a supervisor or designee during a heat wave. Under §3395, a ‘heat wave’ is defined precisely: any day in which the predicted high temperature will be at least 80°F and at least 10°F higher than the average high daily temperature in the preceding five days.
This definition is operationally demanding. A sudden temperature spike — such as a forecast high of 95°F following a five-day average of 75°F — triggers the heat wave protocol for all employees, not just new hires. Employers must monitor daily forecasts and activate enhanced observation whenever this two-part threshold is met.
! Proposed Changes to Acclimatization Under the August 2026 Draft
The August 14, 2026 revised discussion draft proposes expanded acclimatization requirements beyond the current 14-day observation window. The draft adds new close-observation requirements for employees returning to work after a period of absence from heat-exposed conditions — not just newly assigned employees.
A notable exception in the proposed language: employers can opt out of the new acclimatization requirements if the employee consistently worked under comparable heat conditions during the prior 14 days. Public comment is open through September 21, 2026.
Under the current enforceable standard (§3395 as of September 2026), the acclimatization requirement remains: close observation of newly assigned employees for 14 days, and close observation of all employees during heat waves.
Requirement 6: Training — What Employees and Supervisors Must Know
Section 3395(h) requires effective training for both supervisory and non-supervisory employees before they begin work that could reasonably be expected to result in heat illness exposure. Generic training is not sufficient — training must address the specific worksite, the employer’s specific procedures, and the employer’s specific HIPP.
Required Employee Training Topics (§3395(h)(1))
- Environmental and personal risk factors for heat illness, including the added burden of exertion, clothing, and PPE
- The employer’s specific procedures for water, shade, cool-down rests, and first aid access, and the employee’s right to exercise these rights without retaliation
- The importance of frequent consumption of small quantities of water — up to 4 cups per hour — when the work environment is hot and sweating is likely
- Acclimatization: the concept, its importance, and the specific methods in the employer’s HIPP
- The different types of heat illness (heat cramps, heat exhaustion, heat syncope, heat stroke), their signs and symptoms, and appropriate first aid and emergency responses — including that heat illness may progress quickly from mild to life-threatening
- The importance of immediately reporting symptoms of heat illness — in themselves or in coworkers — to the employer or supervisor
- The employer’s procedures for responding to signs or symptoms of heat illness and for contacting emergency medical services
- Emergency response procedures including how to provide clear directions to the worksite for emergency responders
Additional Supervisor Training Requirements (§3395(h)(2))
Supervisors must also be trained on:
- The procedures the supervisor must follow to implement the applicable provisions of §3395
- The procedures to follow when an employee exhibits signs or reports symptoms consistent with possible heat illness, including emergency response
- How to monitor weather reports and how to respond to hot weather advisories
Training must occur before work begins. It is not sufficient to provide training after the first heat exposure or at the start of a new project. For operations where workers are newly assigned throughout the year, an ongoing training program is required.
Requirement 7: The Heat Illness Prevention Plan (HIPP)
Section 3395(i) requires every covered employer to establish, implement, and maintain a written Heat Illness Prevention Plan. The HIPP must be:
- Written in English and in the language understood by the majority of employees
- Available at the worksite to employees and to Cal/OSHA representatives upon request
- Integrated into the employer’s Injury and Illness Prevention Program (IIPP) or maintained as a separate document
At a minimum, the HIPP must contain written procedures for:
- Provision of water and access to shade (§3395(c) and (d))
- High-heat procedures for 95°F conditions (§3395(e)) — for enumerated industries
- Emergency response procedures (§3395(f))
- Acclimatization methods and procedures (§3395(g))
! Proposed HIPP Distribution Requirement — August 2026 Draft
Currently, §3395 requires the HIPP to be written and available at the worksite — but does not require employers to actively distribute it to each employee.
The August 2026 discussion draft proposes an affirmative distribution requirement: employers would be required to distribute the HIPP upon hire, during heat illness prevention training, and at least once annually to every covered employee. The proposal limits required distribution to no more than twice per employee per year and would permit electronic posting and distribution in certain circumstances.
This proposed change reflects a common enforcement finding: workers who have never seen the employer’s heat plan cannot report violations or protect themselves. If finalized, it would add a documentation obligation — employers would need to confirm and record HIPP distribution.
Cal/OSHA §3395 Requirements at a Glance
This table maps every §3395 requirement to its trigger condition and enforcement status. The ‘Proposed Change’ column reflects the August 2026 discussion draft — not yet in effect.
| Requirement | Current Trigger / Scope | Proposed Change (August 2026 Draft) |
| Water: 1 qt/employee/hour, cool, free, at work location | All temperatures — all industries | No change proposed |
| Shade available on request | Temperature < 80°F — all industries | No change proposed |
| Shade present continuously | Temperature ≥ 80°F — all industries | No change proposed |
| Preventative cool-down rest allowed and encouraged | All temperatures — all industries | No change proposed |
| Preventative cool-down rest: minimum 5 minutes + travel time | Employee requests cool-down rest — all industries | No change proposed |
| High-heat procedures: communication, observation, emergency designee, water reminders, pre-shift meeting | Temperature ≥ 95°F — agriculture, construction, landscaping, oil/gas, qualifying transportation only | Proposed: expand to ALL outdoor employers |
| Mandatory 10-min cool-down rest every 2 hours | Temperature ≥ 95°F — agriculture only | No change proposed |
| Acclimatization: close observation for 14 days | Newly assigned employees — all industries | Proposed: add returning employee requirements |
| Acclimatization: close observation during heat wave | All employees on heat wave days — all industries | No change proposed |
| Emergency response procedures | All temperatures — all industries | No change proposed |
| Written HIPP in English + primary employee language | All employers — all temperatures | Proposed: add active distribution requirement |
| HIPP available at worksite for employees and Cal/OSHA | All employers | Proposed: add per-hire, training, and annual distribution |
| Employee training before heat exposure | All employees before beginning work — all industries | No change proposed |
| Supervisor training: monitoring, response, weather monitoring | All supervisors — all industries | No change proposed |
§3396 Indoor Heat Standard: What Employers with Mixed Operations Must Know
On July 23, 2024, California enacted Title 8, Section 3396 — Heat Illness Prevention in Indoor Places of Employment. This standard applies to most indoor workplaces where the indoor temperature reaches 82°F. For employers with both outdoor and indoor operations, §3395 and §3396 apply simultaneously to their respective environments.
| Element | §3395 — Outdoor | §3396 — Indoor |
| Applicable standard | §3395 — Outdoor | §3396 — Indoor (effective July 23, 2024) |
| Temperature scope | All outdoor workplaces | Indoor workplaces where temperature exceeds 82°F |
| Water requirement | 1 qt/employee/hour, free, at work area | 1 qt/employee/hour, free, at work area and cool-down areas |
| Shade / Cool-down area | Shade required at 80°F | Cool-down area required when temperature ≥ 82°F; must be kept below 82°F |
| High-heat trigger | 95°F — enumerated industries only (proposed: all outdoor employers) | Not an equivalent high-heat trigger in §3396 as currently structured |
| Temperature monitoring | Dry bulb thermometer; employer must measure at work location | Employer must measure and record temperature and heat index; identify all environmental risk factors |
| Written plan | Written HIPP required | Written Heat Illness Prevention Plan required; may integrate with §3395 HIPP or IIPP |
| Training | Required before heat exposure | Required before heat exposure |
| Citation exposure | Both standards cite separately if each is violated | Both standards cite separately if each is violated |
Employers with operations that include both outdoor work areas and indoor environments where temperatures reach 82°F — warehouses, packing sheds, processing facilities, maintenance shops — must evaluate each work environment separately and comply with the applicable standard in each. Cal/OSHA may cite under both standards for the same event if both environments were involved.
Temperature Monitoring: What §3395 Requires and Why On-Site Data Matters
Section 3395 defines ‘temperature’ as the dry bulb temperature obtained by measuring the outdoor temperature in an area without shade — with the thermometer bulb or sensor shielded from direct sunlight during measurement. The standard does not specify how frequently monitoring must occur, but it creates implied obligations: employers must know when their worksite temperature reaches 80°F (shade trigger) and 95°F (high-heat trigger) in time to implement the required protections.
The implicit monitoring requirement is operationally significant. An employer who implements shade and high-heat procedures on a delay — because no one was monitoring conditions — has not complied. The triggers apply when the threshold is reached at the work location, not when the employer becomes aware of it.
| Factor | Regional Forecast / Weather App | NOAA / NWS Data | On-Site Professional Monitoring (cyclonePORT) |
| §3395 compliance posture | Regional airport data may be 10-25 miles from the worksite and meaningfully cooler or hotter than actual conditions — does not satisfy ‘temperature at the work location’ | NWS forecast is not a measurement of actual current conditions at the worksite | Measures actual conditions at the worksite; timestamped log documents when 80°F and 95°F thresholds were crossed |
| 80°F shade trigger | Supervisor must manually check an app — may miss the exact threshold crossing | Forecast-only — not real-time worksite conditions | Automatic alert delivered simultaneously to all supervisors the moment 80°F is reached at the worksite |
| 95°F high-heat trigger | Manual app monitoring required; no guarantee supervisor sees it in time | Not real-time at worksite | Automatic alert triggers high-heat protocol activation immediately — pre-shift meeting, buddy system, water reminders |
| Heat wave detection | Consumer apps typically don’t calculate the 10°F-above-5-day-average threshold definition in §3395 | NWS can provide forecast highs but does not calculate the §3395 heat wave definition automatically | Historical temperature data from the site can be used alongside NWS forecast highs to apply the §3395 heat wave definition |
| Cal/OSHA inspection record | Cannot document what temperature was observed, when, and whether thresholds were met | No site-specific log | Automatic timestamped log of every temperature reading and every threshold crossing — the compliance record Cal/OSHA investigators request |
→ How cyclonePORT Supports Cal/OSHA §3395 Compliance
cyclonePORT measures temperature and humidity at the actual outdoor work location — not at a regional airport or forecast grid point — giving supervisors the precise readings that define the §3395 shade and high-heat triggers.
When temperature reaches 80°F, simultaneous push alerts go to all registered supervisors via the RadarOmega app: shade must be present. When temperature reaches 95°F, simultaneous alerts trigger the high-heat protocol for enumerated industries. Both thresholds are configurable.
Every temperature reading, every threshold crossing, and every alert delivery is automatically logged with a timestamp. When Cal/OSHA investigates a heat illness complaint — as they did with Parkwood beginning from a single employee complaint — this log is the compliance record that demonstrates you acted when the threshold was reached.
For employers covered under both §3395 and §3396: cyclonePORT’s sensors can support monitoring for both the outdoor and indoor temperature triggers from a unified platform.
Cal/OSHA §3395 Compliance Checklist
Use this checklist to audit your outdoor heat program against every current §3395 requirement. Items marked * are also required for indoor operations under §3396 if indoor temperatures reach 82°F.| Program Element | What to Confirm | ✓ | ✗ |
| Written HIPP | Written in English and the primary language of the majority of employees; available at the worksite for employees and Cal/OSHA on request; contains all four required components (water/shade, high-heat procedures, emergency response, acclimatization) * | ☐ | ☐ |
| Water supply | Fresh, pure, suitably cool, free drinking water at or near work areas; minimum 1 quart per employee per hour for entire shift; replenishment plan documented * | ☐ | ☐ |
| Shade < 80°F | Shade available upon employee request; access is timely and documented in HIPP * | ☐ | ☐ |
| Shade ≥ 80°F | Shade present continuously; sufficient to accommodate all employees on rest periods simultaneously, fully in shade, without physical contact * | ☐ | ☐ |
| Cool-down rest rights | Employees are allowed and encouraged to take preventative cool-down rests at any time; cool-down worker is monitored and not sent back before symptoms abate and 5 minutes has elapsed | ☐ | ☐ |
| Emergency response — communication | Effective two-way communication maintained so workers can contact a supervisor or EMS at all times; electronic device communication tested for reliable reception | ☐ | ☐ |
| Emergency response — no abandonment | Workers showing heat illness symptoms are monitored and not sent home without being offered on-site first aid and/or EMS * | ☐ | ☐ |
| Emergency response — site directions | Clear, precise directions to the worksite available for emergency responders; designated person to ensure emergency procedures are invoked when appropriate | ☐ | ☐ |
| 95°F high-heat — pre-shift meeting | Pre-shift meetings held before each shift when temperatures will reach 95°F (enumerated industries) | ☐ | ☐ |
| 95°F high-heat — observation system | One of the four acceptable observation methods is implemented: supervisor/designee (≤20 workers), buddy system, radio/cell check-in, or other effective method (enumerated industries) | ☐ | ☐ |
| 95°F high-heat — emergency designee | One or more employees designated as authorized to call EMS; other employees may call EMS when designated employee is unavailable (enumerated industries) | ☐ | ☐ |
| 95°F high-heat — water reminders | Active reminders throughout the shift to drink water (enumerated industries) | ☐ | ☐ |
| Agriculture 95°F — mandatory rest | 10-minute minimum net cool-down rest every 2 hours when temperature ≥ 95°F; timing may align with IWC meal/rest periods but additional rest required if workday exceeds 8 hours (agriculture only) | ☐ | ☐ |
| Acclimatization — new employees | Close supervisor observation of newly assigned employees for first 14 days in high-heat area | ☐ | ☐ |
| Acclimatization — heat wave | Close observation of all employees on any day when predicted high is ≥ 80°F and ≥ 10°F above the prior 5-day average high | ☐ | ☐ |
| Employee training | Training completed before work begins; covers all §3395(h)(1) topics including site-specific water, shade, and emergency procedures; training in language employees understand * | ☐ | ☐ |
| Supervisor training | Covers all §3395(h)(2) topics including weather monitoring, emergency response procedures, and how to respond to heat illness signs * | ☐ | ☐ |
| Temperature monitoring | System capable of detecting when worksite temperature reaches 80°F and 95°F; real-time or near real-time monitoring at the work location; log documenting when thresholds were reached * | ☐ | ☐ |
| Automated threshold alerts | All supervisors alerted simultaneously when 80°F and 95°F thresholds are crossed — without requiring manual app checks | ☐ | ☐ |
| Compliance log | Timestamped record of temperature readings, threshold crossings, alerts delivered, and any heat illness incidents — available for Cal/OSHA inspection | ☐ | ☐ |
Frequently Asked Questions: Cal/OSHA §3395 Heat Requirements
What are the exact temperature thresholds in Cal/OSHA's outdoor heat standard?
Which California industries are required to implement high-heat procedures at 95°F?
What is the water requirement under Cal/OSHA's outdoor heat standard?
What is the Cal/OSHA definition of a 'heat wave' under §3395?
What is the Heat Illness Prevention Plan (HIPP) requirement under §3395?
What penalties does Cal/OSHA impose for heat standard violations?
Does California's outdoor heat standard apply to my workers even if we're a small company with just a few employees?
Next Steps: Building a §3395-Compliant Heat Program
The practical lesson from the December 2024 Parkwood citation is that Cal/OSHA enforcement starts with a single complaint, and the investigation examines everything: was water available, was shade present, were workers trained, was a written plan in place. The absence of any one element creates a separate citable violation.- Write or update your Heat Illness Prevention Plan (HIPP) — in English and in the primary language of your workers. The HIPP must include water/shade procedures, high-heat procedures (if applicable), emergency response, and acclimatization methods.
- Implement on-site temperature monitoring at each outdoor work location capable of detecting the 80°F shade trigger and 95°F high-heat trigger in real time — not a regional weather app checked periodically.
- Configure automatic threshold alerts so all supervisors at each worksite are simultaneously notified when 80°F and 95°F are reached — without requiring anyone to remember to check.
- Ensure water supply meets the 1 quart per employee per hour standard at or near each work area — confirm workers are not purchasing their own water.
- Train all employees and supervisors before they begin work in outdoor heat conditions — training must be site-specific, in the employees’ primary language, and cover all §3395(h) topics.
- Build the compliance log — document temperature readings, threshold crossings, shade and water access, training records, and any heat illness incidents. This is what Cal/OSHA will request when a complaint triggers an investigation.
- Monitor the AB 2243 rulemaking — the August 2026 discussion draft is open for public comment through September 21, 2026. If adopted, it will expand high-heat procedures to all outdoor industries and add HIPP distribution requirements. Review your program against both the current standard and the proposed changes.
Additional Resources
- Cal/OSHA Heat Illness Prevention — www.dir.ca.gov/dosh/heatillnessinfo.html
- Title 8 CCR §3395 full text — www.dir.ca.gov/Title8/3395.html
- Title 8 CCR §3396 full text (indoor) — www.dir.ca.gov/title8/3396.html
- Cal/OSHA Heat Illness Prevention eTool — www.dir.ca.gov/dosh/etools/08-006/
- Parkwood Landscape $276,425 citation press release — dir.ca.gov/DIRNews/2024/2024-105.html
- Cal/OSHA Penalty Schedule (2024 update) — dir.ca.gov/DIRNews/2024/2024-16.html
- AB 2243 August 2026 discussion draft — available via cal/osha.ca.gov rulemaking page
Related cyclonePORT resources:
- The Proposed Federal OSHA Heat Rule: What Employers Need to Know in 2026 — cycloneport.com
- Weather Monitoring for Construction & Contractors — cycloneport.com
- Weather Monitoring for Farms & Agricultural Operations — cycloneport.com
- OSHA Lightning Safety Requirements for Outdoor Workers: The Complete 2026 Guide — cycloneport.com
