* WHAT...Dangerously hot conditions. Afternoon temperatures 107 to
112 with apparent temperatures between 110 and 120 degrees. Major
Heat Risk.

* WHERE...In Arizona, Parker Valley and Yuma. In California,
Chuckwalla Valley, Imperial County West, Imperial Valley, Palo
Verde Valley, and Salton Sea.

* WHEN...Until 8 PM MST /8 PM PDT/ this evening.

* IMPACTS...Heat related illnesses increase significantly during
extreme heat events. Overexposure can cause heat cramps and heat
exhaustion to develop and, without intervention, can lead to heat
stroke.

An Extreme 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.