* WHAT...For the Extreme Heat Warning, dangerously hot conditions
with high temperatures in the 90s to near 100 on Thursday with
morning low temperatures in the 70s expected.

* WHERE...Santa Ana Mountains and Foothills.

* WHEN...Until 8 PM PDT Thursday.

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

* ADDITIONAL DETAILS...Areas of Major HeatRisk. Very warm overnight
temperatures will limit relief from the heat.

Drink plenty of fluids, stay in an air-conditioned room, stay out of
the sun, and check up on relatives and neighbors.

Take extra precautions when outside. Wear lightweight and loose
fitting clothing. Try to limit strenuous activities to early morning
or evening. Take action when you see symptoms of heat exhaustion and
heat stroke.

* WHAT...For the Extreme Heat Warning, dangerously hot conditions
with high temperatures in the 80s at the beaches to the mid to
upper 90s along higher coastal terrain on Thursday with morning low
temperatures in the lower to mid 70s.

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

* WHEN...Until 8 PM PDT Thursday.

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

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

Drink plenty of fluids, stay in an air-conditioned room, stay out of
the sun, and check up on relatives and neighbors.

Do not leave young children and pets in unattended vehicles. Car
interiors will reach lethal temperatures in a matter of minutes.

If you do not have air conditioning in your home or lack shelter, you
can call 211 or visit 211ca.org for assistance locating appropriate
shelter from the heat.

* WHAT...Dangerously hot conditions with high temperatures of 107 to
112 expected with low temperatures in the 80s expected.

* WHERE...Coachella Valley, San Diego County Deserts, and San
Gorgonio Pass near Banning.

* WHEN...Until 8 PM PDT Friday.

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

* ADDITIONAL DETAILS...Areas of Major HeatRisk. Very warm overnight
temperatures will limit relief from the heat.

Drink plenty of fluids, stay in an air-conditioned room, stay out of
the sun, and check up on relatives and neighbors.

Do not leave young children and pets in unattended vehicles. Car
interiors will reach lethal temperatures in a matter of minutes.

* WHAT...For the Extreme Heat Warning, dangerously hot conditions
with high temperatures in the 90s to 103 on Thursday with morning
low temperatures in the 70s expected.

* WHERE...San Diego County Valleys.

* WHEN...Until 8 PM PDT Thursday.

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

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

Drink plenty of fluids, stay in an air-conditioned room, stay out of
the sun, and check up on relatives and neighbors.

Do not leave young children and pets in unattended vehicles. Car
interiors will reach lethal temperatures in a matter of minutes.

* WHAT...Minor coastal flooding from high tides this evening.

* WHERE...Beaches of Orange and San Diego Counties.

* WHEN...Until 11 PM PDT.

* IMPACTS...Flooding of lots, parks, and roads with only
isolated road closures expected. Most likely during Wednesday
evening's high tide.

* ADDITIONAL DETAILS...High tides this evening at Newport Beach:
6.3 feet at 845 PM. At La Jolla: 6.3 feet at 839 PM. Measured
high tides are exceeding predicted levels by 6-7 inches.

If travel is required, allow extra time as some roads may be
closed. Do not drive around barricades or through water of
unknown depth. Take the necessary actions to protect flood-prone
property.

* WHAT...High temperatures in the 90s below 5500 feet expected.

* WHERE...Riverside County Mountains and San Diego County Mountains.

* WHEN...Until 8 PM PDT Thursday.

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

* ADDITIONAL DETAILS...Moderate HeatRisk. Warm overnight temperatures
will limit relief from the heat.

Drink plenty of fluids, stay in an air-conditioned room, stay out of
the sun, and check up on relatives and neighbors.

Do not leave young children and pets in unattended vehicles. Car
interiors will reach lethal temperatures in a matter of minutes.