Extreme Heat Warning: Santa Barbara County Southwestern Coast; Santa Barbara County Southeastern Coast; Santa Ynez Mountains Western Range; Santa Ynez Mountains Eastern Range; Lake Casitas; Ojai Valley; Central Ventura County Valleys; Western Santa Monica Mountains Recreational Area; Eastern Santa Monica Mountains Recreational Area; Calabasas and Agoura Hills; Southeastern Ventura County Valleys; Western Antelope Valley Foothills; Eastern Antelope Valley Foothills; Antelope Valley

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Extreme Heat Warning — Santa Barbara County Southwestern Coast; Santa Barbara County Southeastern Coast; Santa Ynez Mountains Western Range; Santa Ynez Mountains Eastern Range; Lake Casitas; Ojai Valley; Central Ventura County Valleys; Western Santa Monica Mountains Recreational Area; Eastern Santa Monica Mountains Recreational Area; Calabasas and Agoura Hills; Southeastern Ventura County Valleys; Western Antelope Valley Foothills; Eastern Antelope Valley Foothills; Antelope Valley Severity: Severe. Certainty: Likely. * WHAT...Temperatures of 90 to 110 degrees, hottest on Wednesday and over interior areas. * WHERE...A portion of southwest California. * WHEN...Until 8 PM PDT Thursday. * IMPACTS...There is a high risk for dangerous heat illness for anyone, especially for the very young, the very old, those without air conditioning, and those active outdoors. * ADDITIONAL DETAILS...Humid conditions will add to the heat to potentially worsen heat impacts. Effects of the heat will build through the week, with warm overnight low temperatures providing little relief from the heat.