Does your state require a heat illness plan today?
Five states require a written heat illness prevention plan with their own trigger temperatures: California and Washington measure air temperature, Oregon and Maryland measure the heat index, and Nevada uses a hazard analysis with no fixed temperature. Enter your state and today's conditions to see whether your rule applies right now and exactly what it requires.
Pick your state and enter the temperature to see whether your heat rule applies and what it requires. Nothing you type leaves your browser.
Common questions
▸At what temperature do heat illness rules kick in?
It varies by state. California and Washington measure air temperature (80°F trigger); Oregon and Maryland measure the heat index (80°F trigger, with stricter high-heat rules at 90°F). California adds high-heat procedures at 95°F. Nevada has no temperature trigger at all: its rule is based on a written hazard analysis for employers over 10 employees.
▸What is the heat index and why does it matter?
The heat index combines air temperature and humidity into how hot it actually feels to the body. States like Oregon and Maryland trigger their rules on the heat index, so 88°F with high humidity can cross the 90°F high-heat threshold even though the thermometer reads under 90.
▸Do I need a written plan even if my state has no rule?
There is no federal written-plan mandate yet, but OSHA can cite excessive heat under the General Duty Clause and inspects proactively under its heat National Emphasis Program. A written plan is how you show an inspector, a GC, or an insurer that your program exists.
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