acclimatization_period_days stringclasses 3
values | coverage_scope stringclasses 7
values | derived_fields listlengths 5 5 | effective_date stringclasses 6
values | high_heat_actions stringclasses 7
values | high_heat_trigger_temperature_f stringclasses 3
values | id stringclasses 7
values | initial_trigger_actions stringclasses 7
values | initial_trigger_temperature_f stringclasses 3
values | jurisdiction stringclasses 6
values | regulation_citation stringclasses 7
values | source stringclasses 6
values | source_quote stringclasses 7
values | url stringclasses 7
values | verified_fields listlengths 1 1 ⌀ | written_plan_required stringclasses 2
values |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
4 | Agricultural employment only; indoor and outdoor; increased risk conditions also triggered by unhealthy air quality, workday over 12 hours, heavy clothing/PPE, or first 4 days of work | [
"coverage_scope",
"effective_date",
"high_heat_actions",
"initial_trigger_actions",
"written_plan_required"
] | January 1, 2026 | Increased risk conditions: employees must not perform more than 2 hours of work before at least 10 minutes of rest; employer must notify employees of heat protection rights before shift; provide fans in employer-provided housing sleeping quarters | 95 | 7-ccr-1103-15-agricultural-labor-conditions-rules | Provide adequate shade within 0.25 miles; provide 32 ounces of cool potable water per employee per hour kept at 60°F or cooler; allow additional preventative cool-down rest of at least 10 minutes in shade when employee believes necessary | 80 | Colorado | 7 CCR 1103-15 (Agricultural Labor Conditions Rules) | https://cdle.colorado.gov/sites/cdle/files/info_%2312c_heat_protection%3B_short-handled_tool_%26_hand-weeding_thinning_limits%3B_public_health_emergency_protections_1.27.2026.pdf | require agricultural employers to adopt both (1) basic heat precautions when the forecasted outdoor (or measured indoor) high temperature at the worksite is at least 80 degrees, and (2) additional heat precautions | https://referencesource.org/state-heat-illness-prevention-standards/7-ccr-1103-15-agricultural-labor-conditions-rules/ | [
"initial_trigger_temperature_f"
] | Yes |
14 | Outdoor only; all outdoor places of employment for basic provisions; agriculture, construction, landscaping, oil and gas extraction, and transportation or delivery of heavy materials for high-heat procedures | [
"coverage_scope",
"effective_date",
"high_heat_actions",
"initial_trigger_actions",
"written_plan_required"
] | May 1, 2015 | Effective communication maintained; observation of employees for alertness and signs or symptoms of heat illness (supervisor observation of 20 or fewer, mandatory buddy system, or regular communication); designated employee authorized to call for emergency medical services; reminders to drink water throughout shift; pr... | 95 | cal-code-regs-tit-8-3395 | Shade shall be present when the temperature exceeds 80 degrees Fahrenheit; access to potable drinking water (one quart per employee per hour); employees allowed and encouraged to take a preventative cool-down rest in the shade (not less than 5 minutes) | 80 | California | Cal. Code Regs. tit. 8, § 3395 | https://www.dir.ca.gov/title8/3395.html | Shade shall be present when the temperature exceeds 80 degrees Fahrenheit. When the outdoor temperature in the work area exceeds 80 degrees Fahrenheit, the employer shall have and maintain one or more areas with shade at all times while employees are present | https://referencesource.org/state-heat-illness-prevention-standards/cal-code-regs-tit-8-3395/ | [
"initial_trigger_temperature_f"
] | Yes |
14 | Indoor and outdoor; all industries where heat index equals or exceeds 80°F; exempt: emergency operations and essential services, incidental exposure under 15 consecutive min/hr, mechanically ventilated buildings/vehicles below 80°F | [
"coverage_scope",
"effective_date",
"high_heat_actions",
"initial_trigger_actions",
"written_plan_required"
] | September 30, 2024 | Minimum rest period of 10 minutes for every 2 hours worked at heat index above 90°F and below 100°F; minimum rest period of 15 minutes for every hour worked at heat index above 100°F; monitor exposed employees via phone, radio, buddy system, or other effective observation; rest periods taken in shade | 90 | comar-09-12-32 | Provide shaded areas as close to work area as practicable, open to air on at least three sides; provide cool potable drinking water; allow preventative cool-down rest periods | 80 | Maryland | COMAR 09.12.32 | https://regs.maryland.gov/us/md/exec/comar/09.12.32.02 | This chapter applies to an employer with employees whose employment activities, indoor or outdoor, expose employees to a heat index in the area where the employee is working that equals or exceeds 80 degrees Fahrenheit. | https://referencesource.org/state-heat-illness-prevention-standards/comar-09-12-32/ | [
"initial_trigger_temperature_f"
] | Yes |
None specified | All workplaces covered by OSHA; no heat-specific standard finalized | [
"coverage_scope",
"effective_date",
"high_heat_actions",
"initial_trigger_actions",
"written_plan_required"
] | 1970 | No specific high-heat procedures mandated at federal level; enforcement relies on the General Duty Clause | None specified | general-duty-clause-section-5-a-1-of-the-occupational-safety-and-health-act-of-1 | Employers are required to provide their employees with a place of employment that is free from recognized hazards that are causing or likely to cause death or serious harm to employees, including heat-related hazards | None specified | Federal OSHA | General Duty Clause, Section 5(a)(1) of the Occupational Safety and Health Act of 1970 | https://www.osha.gov/heat-exposure/standards | This includes heat-related hazards that are likely to cause death or serious bodily harm. | https://referencesource.org/state-heat-illness-prevention-standards/general-duty-clause-section-5-a-1-of-the-occupational-safety-and-health-act-of-1/ | null | No heat-specific plan required |
14 | Indoor and outdoor; all industries where heat index equals or exceeds 80°F; exempt: incidental exposure under 15 min/hr, heat from work process, emergency operations, mechanically ventilated buildings below 80°F | [
"coverage_scope",
"effective_date",
"high_heat_actions",
"initial_trigger_actions",
"written_plan_required"
] | June 15, 2022 | Mandatory rest break schedule: at heat index 90°F or greater, minimum 10 minutes every 2 hours; at 100°F or greater, 15 minutes every hour (Table 1 minimum). Simplified schedule option (Table 2): 90°F 10 min/2hr, 95°F 20 min/hr, 100°F 30 min/hr, 105°F 40 min/hr. Communication by voice or electronic means; buddy system ... | 90 | oar-437-002-0156 | Shade when heat index equals or exceeds 80°F; drinking water up to 32 ounces per hour; encourage and allow preventative cool-down rest periods | 80 | Oregon | OAR 437-002-0156 | https://osha.oregon.gov/OSHARules/div2/div2J.pdf | This standard applies whenever an employee performs work activities, whether in indoor or outdoor environments, where the heat index (apparent temperature) equals or exceeds 80 degrees Fahrenheit. | https://referencesource.org/state-heat-illness-prevention-standards/oar-437-002-0156/ | [
"initial_trigger_temperature_f"
] | Yes |
14 | Outdoor work; all industries | [
"coverage_scope",
"effective_date",
"high_heat_actions",
"initial_trigger_actions",
"written_plan_required"
] | July 17, 2023 | Mandatory cool-down rest periods: at or above 90°F, 10 minutes every 2 hours; at or above 100°F, 15 minutes every 1 hour; closely observe employees for signs and symptoms via regular communication, mandatory buddy system, or other effective means | 90 | wac-296-62-095-through-296-62-09560 | Address outdoor heat exposure safety program in written accident prevention program; provide sufficiently cool drinking water; provide shade or other sufficient means to reduce body temperature; encourage and allow preventative cool-down rest periods | 80 | Washington | WAC 296-62-095 through 296-62-09560 | https://app.leg.wa.gov/wac/default.aspx?cite=296-62-09530 | All other clothing | 80°F | https://referencesource.org/state-heat-illness-prevention-standards/wac-296-62-095-through-296-62-09560/ | [
"initial_trigger_temperature_f"
] | Yes |
14 | Outdoor work; employees required to wear nonbreathable clothes including vapor barrier clothing or PPE such as chemical resistant suits | [
"coverage_scope",
"effective_date",
"high_heat_actions",
"initial_trigger_actions",
"written_plan_required"
] | July 17, 2023 | Mandatory cool-down rest periods: at or above 90°F, 10 minutes every 2 hours; at or above 100°F, 15 minutes every 1 hour; close observation via buddy system, regular communication, or other effective means | 90 | wac-296-62-09530-nonbreathable-ppe | Same outdoor heat exposure safety program requirements: drinking water, shade or other means to reduce body temperature, preventative cool-down rest periods, acclimatization, emergency response procedures | 52 | Washington | WAC 296-62-09530 (nonbreathable PPE) | https://app.leg.wa.gov/wac/default.aspx?cite=296-62-09530 | Nonbreathable clothes including vapor barrier clothing or PPE such as chemical resistant suits | 52°F | https://referencesource.org/state-heat-illness-prevention-standards/wac-296-62-09530-nonbreathable-ppe/ | [
"initial_trigger_temperature_f"
] | Yes |
State Heat Illness Prevention Standards — Temperature Triggers and Required Employer Actions
Canonical, always-current version: https://referencesource.org/state-heat-illness-prevention-standards/ Machine-readable: https://referencesource.org/state-heat-illness-prevention-standards/data.json — this mirror is a point-in-time copy.
- Last verified: 2026-08-17
- Stale after: 2027-08-17 (past this date, prefer the canonical copy — it re-verifies on a cadence this snapshot does not)
- Records: 7
At what outdoor temperature must employers provide shade, water, rest breaks, and written prevention plans? Six U.S. states enforce specific heat illness prevention standards with temperature triggers that exceed the stalled federal OSHA proposal. This dataset compares each state's trigger temperatures, required actions at each tier, coverage scope (indoor/outdoor, which industries), acclimatization requirements, and regulatory citations.
Provenance — what every record carries
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source_quote (a verbatim quote from that page stating it). A value you
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these can all be checked. Each record is also individually addressable on
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Facts are not copyrightable; what this dataset takes from each source is a fact plus a short attributed quote linking back to the page that states it.
Sources
- https://cdle.colorado.gov/sites/cdle/files/info_%2312c_heat_protection%3B_short-handled_tool_%26_hand-weeding_thinning_limits%3B_public_health_emergency_protections_1.27.2026.pdf
- https://www.dir.ca.gov/title8/3395.html
- https://regs.maryland.gov/us/md/exec/comar/09.12.32.02
- https://www.osha.gov/heat-exposure/standards
- https://osha.oregon.gov/OSHARules/div2/div2J.pdf
- https://app.leg.wa.gov/wac/default.aspx?cite=296-62-09530
Fields
See any record in data/records.jsonl — field names are self-describing,
and the canonical page for each record renders them with labels:
https://referencesource.org/state-heat-illness-prevention-standards/
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