* WHAT...Dangerously hot conditions. Afternoon temperatures 104 to
112. Major Heat Risk. Overexposure can cause heat cramps and heat
exhaustion to develop and, without intervention, can lead to heat
stroke.

* WHERE...Portions of south central and southwest Arizona and
southeast California.

* WHEN...Until 8 PM MST /8 PM PDT/ Monday.

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

An Excessive Heat Warning means that a period of very hot
temperatures, even by local standards, will occur. Actions should be
taken to lessen the impact of the extreme heat.

Take extra precautions if you work or spend time outside. When
possible, reschedule strenuous activities to early morning or
evening. Know the signs and symptoms of heat exhaustion and heat
stroke. Wear lightweight and loose-fitting clothing when possible
and drink plenty of water.

To reduce risk during outdoor work, the Occupational Safety and
Health Administration recommends scheduling frequent rest breaks in
shaded or air conditioned environments. Anyone overcome by heat
should be moved to a cool and shaded location. Heat stroke is an
emergency! Call 9 1 1.

Public cooling shelters are available in some areas. Consult county
officials for more details.

* WHAT...Dangerously hot conditions with high temperatures of 90 to
100F. Low temperatures 65 to 70.

* WHERE...Santa Ana Mountains and Foothills.

* WHEN...Until 8 PM PDT Monday.

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

* ADDITIONAL DETAILS...Moderate to locally major HeatRisk.

Drink plenty of fluids, stay in an air-conditioned room, stay out of
the sun, and check up on relatives and neighbors. Temperatures will
be much hotter above the marine layer.

* WHAT...Dangerously hot conditions with high temperatures upper 90s
to 105 degrees. Low temperatures 65 to 72, warmest in the higher
terrain.

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

* WHEN...Until 8 PM PDT Monday.

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

* ADDITIONAL DETAILS...Major HeatRisk for weekend.

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

* WHAT...Dangerously hot conditions with high temperatures of 110 to
113. Low temperatures in the 80s. Slight cooling is expected on
Tuesday.

* WHERE...Coachella Valley and San Diego County Deserts.

* WHEN...Until 8 PM PDT Monday.

* IMPACTS...Heat related illnesses increase significantly during
extreme heat events. Warm overnight temperatures will lead to less
relief from the heat, prolonging impacts.

* ADDITIONAL DETAILS...Major HeatRisk from excessive temperatures.

Drink plenty of fluids, stay in an air-conditioned room, stay out of
the sun, and check up on relatives and neighbors. Avoid outdoor
recreation and take breaks if you must be outside.

* WHAT...Dangerously hot conditions with temperatures up to 110.

* WHERE...San Gorgonio Pass Near Banning.

* WHEN...Until 8 PM PDT Monday.

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

* ADDITIONAL DETAILS...Major HeatRisk continues.

Drink plenty of fluids, stay in an air-conditioned room, stay out of
the sun, and check up on relatives and neighbors. Avoid outdoor
recreation and take breaks if you must be outside.

* WHAT...High temperatures 90 to 100 across the portions of the
mountains and foothills.

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

* WHEN...Until 8 PM PDT Monday.

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

* ADDITIONAL DETAILS...Hottest conditions expected over the weekend.

Drink plenty of fluids, stay in an air-conditioned room, stay out of
the sun, and check up on relatives and neighbors. Limit outdoor
recreation during the afternoon hours and take breaks if you must be
outside.