34°0'北 / 117°41'西 / 高度 222 m / 04:39 2026-03-21, America/Los_Angeles (UTC-7)
開始于: 2026-03-21, 00:39
到: 2026-03-21, 15:00
* WHAT...Dangerously hot conditions. Afternoon temperatures 94 to 108. Overexposure can cause heat cramps and heat exhaustion to develop and, without intervention, can lead to heat stroke.
* WHERE...Portions of southwest Arizona and southeast and southern California.
* WHEN...Until 8 PM MST /8 PM PDT/ Sunday.
* IMPACTS...Heat related illnesses increase significantly during extreme heat events.
San Bernardino
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.
Recognize the signs and symptoms of heat-related illness. Early
signs include thirst and muscle cramps. Heat exhaustion may include:
cool, moist, pale skin; headache; dizziness; weakness or exhaustion;
nausea. The most serious illness is heat stroke, which may include:
vomiting; confusion; throbbing headache; decreased alertness or loss
of consciousness; high body temperature (above 105F); hot, dry skin;
rapid, weak pulse; rapid, shallow breathing; seizures.
NWS Phoenix AZ
2026-03-21, 00:39開始于: 2026-03-21, 02:16
到: 2026-03-21, 16:00
* WHAT...Dangerously hot temperatures climbing to near-30 degrees above seasonal normals.
* WHERE...Portions of northwest Arizona, southeast California, and southern Nevada.
* WHEN...Until 8 PM PDT / MST Sunday.
* IMPACTS...Heat-related illnesses increase significantly during extreme heat events.
* ADDITIONAL DETAILS...Extreme early-season heat coupled with high tourism rates will make this heat very dangerous, particularly for those not acclimated to the heat and/or traveling from cooler climates. Numerous daily and monthly heat records are in jeopardy through at least Sunday.
San BernardinoDrink 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.
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.
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.
Monitor the latest forecasts and warnings for updates.NWS Las Vegas NV2026-03-21, 02:16