California's Division of Occupational Safety and Health (Cal/OSHA) issued a news release on October 2, 2026 reminding employers to protect workers during high heat. The National Weather Service extreme heat warning for Los Angeles and San Diego regions, including inland Orange County, runs from 10 a.m. Friday, October 2 until 8 p.m. Thursday, October 8, with temperatures from the mid-90s on the coast to as high as 107 in the valleys. Separate heat advisories cover parts of Northern California, with highs up to 103 degrees in certain areas. Cal/OSHA says employers must have heat illness protections in both indoor and outdoor workplaces, and may be covered by both rules if they have workers in each setting. The indoor rule covers most indoor workplaces, such as restaurants, warehouses and manufacturing facilities. When an indoor workplace reaches 82 degrees, employers must take steps that include water, rest, cool-down areas and training. For outdoor work, employers must provide fresh water, access to shade (which must be in place when temperatures exceed 80 degrees) and cool-down rest breaks on request, in addition to regular breaks. At or above 95 degrees, additional high-heat procedures apply in agriculture, construction, landscaping, oil and gas extraction, and transportation of agricultural products, construction materials or other heavy materials. Those include regular observation of employees for signs of heat illness and effective communication methods. Employers in both settings must keep a written prevention plan and train supervisors and employees to recognize heat illness and respond in an emergency. Workers can call Cal/OSHA at 833-579-0927 with questions, and complaints can be filed confidentially with district offices. The release is a reminder of existing rules, not a new standard. Heat warnings can change, so check the National Weather Service forecast for your area.