* WHAT...Dangerously hot conditions with high temperatures ranging from the mid 80s to lower 90s at the beaches to the mid to upper 90s near higher coastal terrain. Nights will be very warm with low temperatures in the lower to mid 70s.
* WHERE...Orange County Coastal Areas.
* WHEN...Until 8 PM PDT Thursday.
* IMPACTS...Heat related illnesses increase significantly during extreme heat events.