Heat Advisory

* WHAT...For the Extreme Heat Warning, dangerously hot conditions with temperatures high temperatures in the upper 90s to 108 with low temperatures in the 70s expected. For the Heat Advisory, high temperatures in the mid 90s to 102 expected.

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

* WHEN...For the Extreme Heat Warning, until 8 PM PDT Wednesday. For the Heat Advisory, from 8 PM Wednesday to 8 PM PDT Thursday.

* IMPACTS...Heat related illnesses increase significantly during extreme heat events. Hot temperatures may cause heat illnesses.

* ADDITIONAL DETAILS...Major HeatRisk through Wednesday. Warm overnight temperatures will limit overnight relief from the heat.