Extreme Heat Warning

* WHAT...Dangerously hot conditions. Afternoon temperatures 107 to 114 expected. Localized Major Heat Risk.

* WHERE...Imperial County Southwest, Imperial County West, and Imperial Valley.

* WHEN...From 10 AM this morning to 8 PM PDT Thursday.

* IMPACTS...Heat related illnesses increase significantly during extreme heat events. Overexposure can cause heat cramps and heat exhaustion to develop and, without intervention, can lead to heat stroke.