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NOAA's National Weather Service
Each location shows all alerts on one page
WARNINGS - WATCHES - ADVISORIES - STATEMENTS
Updates every 15 Minutes
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 EXTREME HEAT WARNING |
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| San Bernardino County | ||
| Effective: Sun, 8/3 1:15am | Severity: Severe | |
| Updated: August 3, 2025 3:15 am | Urgency: Expected | |
| Expires: Sun, 8/3 4:00pm | Certainty: Likely | |
| Areas Affected: Parker Valley - Kofa - Yuma - Central La Paz - Southeast Yuma County - Gila River Valley - Joshua Tree NP West - Joshua Tree NP East - Imperial County Southwest - Salton Sea - Chuckwalla Mountains - Imperial County Southeast - Imperial County West - Imperial Valley - Chiriaco Summit - Palo Verde Valley - Chuckwalla Valley | ||
Alert
Details:
* WHAT...Dangerously hot conditions possible. Afternoon temperatures 108 to 118. Major Heat Risk. * WHERE...Portions of southwest Arizona and southeast and southern California. * WHEN...From 10 AM MST /10 AM PDT/ Wednesday to 8 PM MST /8 PM PDT/ Friday. * 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. Information: 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. |
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 EXTREME HEAT WATCH |
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| San Bernardino County | ||
| Effective: Sun, 8/3 1:57am | Severity: Severe | |
| Updated: August 3, 2025 3:15 am | Urgency: Future | |
| Expires: Sun, 8/3 5:00pm | Certainty: Likely | |
| Areas Affected: Lake Havasu and Fort Mohave - Northwest Deserts - Lake Mead National Recreation Area - Morongo Basin - Cadiz Basin - San Bernardino County-Upper Colorado River Valley - Lake Mead National Recreation Area | ||
Alert
Details:
* WHAT...Dangerously hot conditions with high temperatures between 103 and 106 in Kingman, Golden Valley, and Dolan Springs; between 115 and 120 in Laughlin, Bullhead City, Needles, and Lake Havasu City; between 108 and 112 in the Morongo Basin and Twentynine Palms. Major Heat Risk. * WHERE...Lake Mead National Recreation Area, Lake Havasu and Fort Mohave, Northwest Deserts, Morongo Basin, Cadiz Basin, and San Bernardino County-Upper Colorado River Valley. * WHEN...From Wednesday morning through Thursday evening. * IMPACTS...Heat-related illnesses increase significantly during extreme heat events. Information: 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. Monitor the latest forecasts and warnings for updates. |
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