* WHAT...Temperatures up to 105.

* WHERE...A portion of southwest California.

* WHEN...Until 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.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors.

Take extra precautions when outside. Wear lightweight and loose fitting clothing. Try to limit strenuous activities to early morning or evening. Take action when you see symptoms of heat exhaustion and heat stroke. close