Heat Advisory: Catalina and Santa Barbara Islands; San Luis Obispo County Inland Central Coast; Santa Lucia Mountains; Southern Salinas Valley; San Luis Obispo County Interior Valleys; San Luis Obispo County Mountains; Santa Barbara County Inland Central Coast; Santa Ynez Valley; Ventura County Beaches; Ventura County Inland Coast; Malibu Coast; Los Angeles County Beaches; Palos Verdes Hills; Southern Ventura County Mountains; Northern Ventura County Mountains; San Miguel and Santa Rosa Islands; Santa Cruz and Anacapa Islands

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Heat Advisory — Catalina and Santa Barbara Islands; San Luis Obispo County Inland Central Coast; Santa Lucia Mountains; Southern Salinas Valley; San Luis Obispo County Interior Valleys; San Luis Obispo County Mountains; Santa Barbara County Inland Central Coast; Santa Ynez Valley; Ventura County Beaches; Ventura County Inland Coast; Malibu Coast; Los Angeles County Beaches; Palos Verdes Hills; Southern Ventura County Mountains; Northern Ventura County Mountains; San Miguel and Santa Rosa Islands; Santa Cruz and Anacapa Islands Severity: Moderate. Certainty: Likely. * WHAT...Temperatures up to 103. * WHERE...A portion of southwest California. * WHEN...Until 8 PM PDT Thursday. * IMPACTS...There is a high risk for heat illness for sensitive populations including the very young, the very old, those without air conditioning, and those active outdoors.