* WHAT...Temperatures from 90 to around 100 expected...except up to 105 across the warmest mountains and interior valleys of San Luis Obispo county.
* WHERE...Interior mountains of Los Angeles, Ventura, Santa Barbara, and San Luis Obispo counties as well as the San Fernando, San Gabriel, Santa Clarita, Cuyama and San Luis Obispo interior valleys.
* WHEN...From 10 AM Tuesday to 8 PM PDT Friday.
* 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.
* ADDITIONAL DETAILS...The warmest temperatures with this event are expected to occur Wednesday and Thursday afternoons with only a very modest cool down Friday providing little relief. Temperatures are expected to cool down slightly more over the weekend, but remain above normal into the following week.