Extreme Heat Watch

* WHAT...Dangerously hot conditions with high temperatures reaching the upper 80s to low 90s with limited overnight cooling.

* WHERE...Orange County Coastal Areas and San Diego County Coastal Areas.

* WHEN...From Tuesday morning through Friday evening.

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

* ADDITIONAL DETAILS...The combination of hot daytime temperatures with overnight temperatures struggling to drop below the lower 70s will especially affect those without access to air conditioning.