Cal/OSHA Issues Statewide High Heat Advisory


Oakland—Cal/OSHA is urging all employers to protect their outdoor workers from heat illness as temperatures hit extreme highs this week. The National Weather Service has issued excessive heat warnings for multiple areas throughout the state that will last through Sunday. Temperatures well over 100 degrees are predicted in many locations, including the greater San Diego area and the Inland Empire east of Los Angeles.

Even some cities in the normally cooler San Francisco Bay Area are expected to experience 100+ degree weather, including Concord and Walnut Creek.

“Employers need to be aware of the rules that protect workers from heat illness,” said Cal/OSHA Chief Juliann Sum.  “Water, rest, shade and increased vigilance are absolutely essential in high heat conditions.”

California’s heat regulation requires all employers with outdoor workers to protect outdoor workers by taking these basic steps:

  • Train all employees and supervisors about heat illness prevention.
  • Provide enough fresh water so that each employee can drink at least 1 quart, or four 8-ounce glasses, of water per hour, and encourage them to do so.
  • Provide access to shade and encourage employees to take a cool-down rest in the shade for at least 5 minutes. They should not wait until they feel sick to cool down.
  • Develop and implement written procedures for complying with the Cal/OSHA Heat Illness Prevention Standard.

Cal/OSHA will inspect outdoor worksites in industries such as agriculture, construction, landscaping, and others throughout the heat season. Through partnerships with various employer and worker organizations in different industries, Cal/OSHA will also provide consultation, outreach and training on heat illness prevention.

Cal/OSHA’s award-winning heat illness prevention campaign, the first of its kind in the nation, includes enforcement of heat regulations as well as outreach and training for California’s employers and workers.

Online information on the heat illness prevention requirements and training materials can be obtained at Cal/OSHA’s Heat Illness web page or the Water. Rest. Shade. campaign site. A Heat Illness Prevention e-tool is also available on Cal/OSHA’s website.