Extreme Heat Warning

* WHAT...For the Extreme Heat Warning, dangerously hot conditions with high temperatures in the upper 90s to 106 on Thursday with morning low temperatures in the 70s and lower 80s expected.

* WHERE...San Bernardino and Riverside County Valleys-The Inland Empire.

* WHEN...Until 8 PM PDT Thursday.

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

* ADDITIONAL DETAILS...Major HeatRisk through today. Moderate to major HeatRisk on Thursday. Warm overnight temperatures will limit relief from the heat.