34°25'N / 117°18'V / Höjd 970 m / 14:46 2026-03-15, America/Los_Angeles (UTC-7)
från: 2026-03-15, 11:44
till: 2026-03-15, 22:00
* WHAT...Hot conditions with temperatures 85 to 95 possible below 5500 ft elevation. * WHERE...Riverside County Mountains, San Bernardino County Mountains, and San Diego County Mountains. * WHEN...From Thursday morning through Friday evening. * IMPACTS...Heat related illnesses increase significantly during extreme heat events. * ADDITIONAL DETAILS...High temperatures this week will be 20 to 30 degrees above normal for this time of year. Record breaking heat is likely.
San Bernardino
Drink plenty of fluids, stay in an air-conditioned room, stay out of
the sun, and check up on relatives and neighbors.
Reduce outdoor recreation, especially each afternoon.
Do not leave young children and pets in unattended vehicles. Car
interiors will reach lethal temperatures in a matter of minutes.
NWS San Diego CA
2026-03-15, 11:44från: 2026-03-15, 13:24
till: 2026-03-16, 04:15
* WHERE...Portions of southwest Arizona and southeast and southern California. * WHEN...From Wednesday morning through Sunday evening. * IMPACTS...Heat related illnesses increase significantly during extreme heat events. * ADDITIONAL DETAILS...Afternoon high temperatures between 103 and 108 degrees.
San BernardinoAn Extreme Heat Watch means that a period of very hot temperatures,
even by local standards, may 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.NWS Phoenix AZ2026-03-15, 13:24från: 2026-03-15, 13:37
till: 2026-03-16, 02:00
* WHAT...For the Lake Wind Advisory, north winds 15 to 25 mph with gusts up to 45 mph. For the Extreme Heat Watch, dangerously hot conditions with temperatures up to 106 possible. * WHERE...Lake Mead National Recreation Area, Lake Havasu and Fort Mohave, and San Bernardino County-Upper Colorado River Valley. * WHEN...For the Lake Wind Advisory, until 8 PM PDT /8 PM MST/ Monday. For the Extreme Heat Watch, from Wednesday morning through Friday evening. * IMPACTS...Strong winds and rough waves on area lakes will create hazardous conditions for small craft. Heat related illnesses increase significantly during extreme heat events.
San BernardinoWinds this strong can make driving difficult, especially for high
profile vehicles. Use extra caution.
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.NWS Las Vegas NV2026-03-15, 13:37från: 2026-03-15, 13:37
till: 2026-03-16, 02:00
* WHAT...Dangerously hot conditions with temperatures up to 103 possible. * WHERE...Cadiz Basin, Death Valley National Park, Eastern Mojave Desert, Morongo Basin, and Western Mojave Desert. * WHEN...From Wednesday morning through Friday evening. * IMPACTS...Heat related illnesses increase significantly during extreme heat events.
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.
Monitor the latest forecasts and warnings for updates.NWS Las Vegas NV2026-03-15, 13:37
från: 2026-03-15, 11:44
till: 2026-03-15, 22:00
* WHAT...Hot conditions with temperatures 80 to 90 degrees near the coast and 95 to 105 inland. Hottest weather likely on Thursday and Friday. * WHERE...Orange County Coastal Areas, Orange County Inland Areas, San Bernardino and Riverside County Valleys-The Inland Empire, San Diego County Coastal Areas, San Diego County Valleys, and Santa Ana Mountains and Foothills. * WHEN...From 10 AM Monday to 8 PM PDT Friday. * IMPACTS...Hot temperatures may cause heat illnesses. Increased heat impacts due to long-duration early season heat wave. * ADDITIONAL DETAILS...High temperatures this week will be 20 to 30 degrees above normal for this time of year. Record breaking heat is likely.
San BernardinoDrink plenty of fluids, stay in an air-conditioned room, stay out of
the sun, and check up on relatives and neighbors.
Reduce outdoor recreation, especially each afternoon.
To reduce risk during outdoor work, take 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.NWS San Diego CA2026-03-15, 11:44
från: 2026-03-15, 13:37
till: 2026-03-16, 02:00
* WHAT...For the Lake Wind Advisory, north winds 15 to 25 mph with gusts up to 45 mph. For the Extreme Heat Watch, dangerously hot conditions with temperatures up to 106 possible. * WHERE...Lake Mead National Recreation Area, Lake Havasu and Fort Mohave, and San Bernardino County-Upper Colorado River Valley. * WHEN...For the Lake Wind Advisory, until 8 PM PDT /8 PM MST/ Monday. For the Extreme Heat Watch, from Wednesday morning through Friday evening. * IMPACTS...Strong winds and rough waves on area lakes will create hazardous conditions for small craft. Heat related illnesses increase significantly during extreme heat events.
San BernardinoWinds this strong can make driving difficult, especially for high
profile vehicles. Use extra caution.
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.NWS Las Vegas NV2026-03-15, 13:37