Heat Advisory

* WHAT...High temperatures 90 to 100 degrees expected. Low temperatures in the upper 60s to low 70s.

* WHERE...Orange County Inland Areas, San Diego County Valleys, and Santa Ana Mountains and Foothills.

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

* IMPACTS...Hot temperatures may cause heat illnesses.

* ADDITIONAL DETAILS...Widespread moderate HeatRisk with localized major HeatRisk. Elevated low temperatures will limit overnight relief from the heat.