SACRAMENTO, CA -- As extreme heat is expected to persist across Southern California this week, Cal/OSHA is reminding employers to take required steps to prevent heat illness. These protections include providing adequate drinking water, shade for outdoor workers or cool-down areas for indoor workers, preventative cool-down rests and training.

The National Weather Service has issued Extreme Heat Warnings through 8 p.m. Friday for several areas across Southern California. The warnings cover portions of Los Angeles, Ventura, Santa Barbara, Riverside and San Bernardino cou nties, including inland valleys, mountain areas, the Los Angeles Basin and the Coachella Valley.

Dangerously hot conditions are forecast, with temperatures reaching up to 112 degrees in portions of Los Angeles, Ventura and Santa Barbara counties. In the Coachella Valley, including Palm Springs, Indio, Cathedral City, Palm Desert, La Quinta and Coachella, temperatures are forecast to reach 109 to 113 degrees.

Because weather forecasts are subject to change, employers must remain vigilant, monitor local forecasts and ensure required heat protections remain in place. Visit the National Weather Service website for the latest forecasts and specific areas under heat alerts.

Heat illness is a serious and potentially fatal workplace hazard. Under Cal/OSHA’s Heat Illness Prevention Standards, employers are legally required to protect workers from heat-related illness in both indoor and outdoor workplaces. Employers may be covered by both the indoor and outdoor regulations if they have workers in each setting. See the Comparison Chart of Indoor and Outdoor Heat Illness Prevention Standards for more information.

Cal/OSHA’s Heat Illness Prevention in Indoor Places of Employment regulation applies to most indoor workplaces, such as restaurants, warehouses and manufacturing facilities. When the temperature in an indoor workplace reaches 82 degrees, employers must take steps to protect workers from heat illness. Some of the requirements include providing water, rest, cool-down areas and training.

To prevent heat illness at outdoor worksites, the law requires employers to provide outdoor workers fresh water, access to shade (which must be in place when temperatures exceed 80 degrees) and, whenever requested by a worker, cool-down rest breaks in addition to regular breaks. In certain industries, when the temperature at outdoor worksites reaches or exceeds 95 degrees, Cal/OSHA’s standard requires additional protections. The industries with additional high-heat requirements are agriculture, construction, landscaping, oil and gas extraction and transportation of agricultural products, construction materials or other heavy materials. High-heat procedures include ensuring employees are observed regularly for signs of heat illness and establishing effective communication methods.

Employers in both settings must also maintain a written prevention plan and provide effective training so supervisors and employees can recognize the common signs and symptoms of heat illness and know what to do in an emergency.

Additional Resources
Cal/OSHA’s Heat Illness Prevention special emphasis program includes enforcement of the heat standards as well as multilingual outreach and training programs for California’s employers and workers. Details on heat illness prevention requirements, training materials and tools are available on Cal/OSHA’s Heat Illness Prevention web page and at 99calor.org.

Cal/OSHA has established the Heat Illness Prevention (HIP) Network, a voluntary partnership aimed at increasing awareness among employers and workers about the importance of preventing heat illness. To join the HIP Network, email  HIPNetwork@dir.ca.gov.