Extreme Heat Warning

* WHAT...Dangerously hot conditions with high temperatures 100 to 108 and low temperatures in the 70s and lower 80s.

* WHERE...Apple and Lucerne Valleys.

* WHEN...From 10 AM Thursday to 8 PM PDT Monday.

* IMPACTS...Heat related illnesses increase significantly during extreme heat events.

* ADDITIONAL DETAILS...Areas of major HeatRisk. Elevated low temperatures will limit overnight relief from the heat.