News
July 17, 2026

Cal/OSHA Issues Heat Safety Reminder as High Temperatures Impact California

Construction Owners Editorial Team

Highlights

  • Cal/OSHA is urging employers to strengthen heat illness prevention measures as high temperatures affect parts of California.
  • Heat advisories, watches and warnings are in effect across portions of Central and Southern California.
  • Employers must provide water, shade, cool-down areas and rest breaks under California's heat illness prevention standards.
  • Additional high-heat requirements apply to construction and other outdoor industries when temperatures reach 95 degrees Fahrenheit or higher.
  • Indoor workplaces must implement heat protections when temperatures reach 82 degrees Fahrenheit.

Construction employers across California are being reminded to reinforce heat illness prevention measures as state and federal weather agencies forecast dangerous temperatures across multiple regions. Cal/OSHA has issued a statewide advisory emphasizing employers' legal responsibilities to protect workers from heat-related illnesses in both indoor and outdoor work environments.

Heat Protection Requirements for Construction Sites

Cal/OSHA noted that outdoor employers must provide workers with fresh drinking water, access to shade and cool-down rest periods to reduce the risk of heat illness. Shade must be available when temperatures exceed 80 degrees Fahrenheit, and workers may request cool-down breaks whenever needed.

For construction and other industries covered by California's high-heat requirements, additional protective measures become mandatory when outdoor temperatures reach or exceed 95 degrees Fahrenheit. These measures include enhanced worker observation, emergency communication procedures and monitoring for signs of heat-related illness.

The agency also reminded employers that written heat illness prevention plans and employee training are required under state regulations.

Indoor Workplace Standards

Heat protection requirements also apply to many indoor work environments, including warehouses and manufacturing facilities. When indoor temperatures reach 82 degrees Fahrenheit, employers must implement measures such as providing drinking water, cool-down areas, rest opportunities and worker training.

According to weather forecasts cited by Cal/OSHA, portions of Central and Southern California are expected to experience temperatures ranging from 90 to more than 110 degrees Fahrenheit under current heat advisories, watches and warnings.

Why It Matters

Extreme heat remains one of the leading seasonal safety hazards for construction and industrial employers. Compliance with California's heat illness prevention standards helps contractors reduce worker health risks, avoid regulatory violations and maintain safe jobsite operations during periods of elevated temperatures.

Source: DIR State Of California.

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