Severe

Significant threat to life or property

Red Flag Warning Colorado | Effective 03/17/2026 01:16

Public safety alert, emergency alert, and weather alert<br /> Description:<br /> The National Weather Service in Denver has issued a Red Flag<br /> Warning for wind and low relative humidity, which is in effect<br /> from 10 AM this morning to 8 PM MDT this evening. A Fire Weather<br /> Watch has also been issued. This Fire Weather Watch for wind and<br /> low relative humidity is in effect from Wednesday afternoon<br /> through Wednesday evening. * AFFECTED AREA...Fire Weather Zone 243.

Fire Weather Watch Colorado | Effective 03/17/2026 01:16

Public safety alert, emergency alert, and weather alert<br /> Description:<br /> The National Weather Service in Denver has issued a Red Flag<br /> Warning for wind and low relative humidity, which is in effect<br /> from 10 AM this morning to 8 PM MDT this evening. A Fire Weather<br /> Watch has also been issued. This Fire Weather Watch for wind and<br /> low relative humidity is in effect from Wednesday afternoon<br /> through Wednesday evening. * AFFECTED AREA...Fire Weather Zone 243.

Red Flag Warning Colorado | Effective 03/17/2026 01:16

Public safety alert, emergency alert, and weather alert<br /> Description:<br /> * AFFECTED AREA...Fire Weather Zones 238, 242, 244, 248, 249,<br /> 250 and 251. * TIMING...For the Red Flag Warning, from 10 AM this morning to<br /> 8 PM MDT this evening. For the Fire Weather Watch, from<br /> Wednesday afternoon through Wednesday evening. * WINDS...Northwest 20 to 30 mph with gusts up to 45 mph. * RELATIVE HUMIDITY...As low as 14 percent. On Wednesday, as low<br /> as 11 percent. * IMPACTS...Conditions will be favorable for rapid fire spread.<br />

Fire Weather Watch Colorado | Effective 03/17/2026 01:16

Public safety alert, emergency alert, and weather alert<br /> Description:<br /> * AFFECTED AREA...Fire Weather Zones 238, 242, 244, 248, 249,<br /> 250 and 251. * TIMING...For the Red Flag Warning, from 10 AM this morning to<br /> 8 PM MDT this evening. For the Fire Weather Watch, from<br /> Wednesday afternoon through Wednesday evening. * WINDS...Northwest 20 to 30 mph with gusts up to 45 mph. * RELATIVE HUMIDITY...As low as 14 percent. On Wednesday, as low<br /> as 11 percent. * IMPACTS...Conditions will be favorable for rapid fire spread.<br />

Fire Weather Watch South Dakota, Wyoming | Effective 03/17/2026 00:48

Public safety alert, emergency alert, and weather alert<br /> Description:<br /> ...CRITICAL FIRE WEATHER CONDITIONS POSSIBLE WEDNESDAY ACROSS<br /> PORTIONS OF NORTHEASTERN WYOMING AND FAR SOUTHWESTERN SOUTH<br /> DAKOTA... .Dry air will spread into portions of northeastern Wyoming and far<br /> southwestern South Dakota on Wednesday, leading to relative<br /> humidities as low as 15 percent. West winds may exceed 30 mph<br /> through the afternoon. The combination of low humidity and gusty<br />

Extreme Heat Warning California | Effective 03/17/2026 00:33

Public safety alert, emergency alert, and weather alert<br /> Description:<br /> * WHAT...Dangerously hot conditions with high temperatures of 98 to<br /> 108 expected. * WHERE...San Gorgonio Pass near Banning. * WHEN...From 10 AM Wednesday to 8 PM PDT Saturday. * IMPACTS...Heat related illnesses increase significantly during<br /> extreme heat events. Instruction:<br /> Drink plenty of fluids, stay in an air-conditioned room, stay out of<br /> the sun, and check up on relatives and neighbors.

Extreme Heat Warning California | Effective 03/17/2026 00:33

Public safety alert, emergency alert, and weather alert<br /> Description:<br /> * WHAT...Dangerously hot conditions with high temperatures of 105<br /> to 110 expected. * WHERE...Coachella Valley. * WHEN...From 10 AM Wednesday to 8 PM PDT Saturday. * IMPACTS...Heat related illnesses increase significantly during<br /> extreme heat events. Instruction:<br /> Drink plenty of fluids, stay in an air-conditioned room, stay out of<br /> the sun, and check up on relatives and neighbors. Do not leave young children and pets in unattended vehicles. Car<br />

Extreme Heat Warning California | Effective 03/17/2026 00:33

Public safety alert, emergency alert, and weather alert<br /> Description:<br /> * WHAT...Dangerously hot conditions with high temperatures of 105 to<br /> 110 expected. * WHERE...San Diego County Deserts. * WHEN...From 10 AM Wednesday to 8 PM PDT Saturday. * IMPACTS...Heat related illnesses increase significantly during<br /> extreme heat events. Instruction:<br /> Drink plenty of fluids, stay in an air-conditioned room, stay out of<br /> the sun, and check up on relatives and neighbors.

Extreme Heat Warning Arizona | Effective 03/17/2026 00:44

Public safety alert, emergency alert, and weather alert<br /> Description:<br /> * WHAT...Dangerously hot conditions with high temperatures of 95 to<br /> 100 degrees expected. The hottest days are currently expected to be<br /> Friday March 20 and Saturday March 21. * WHERE...Eastern Cochise County below 5000 feet, Upper Gila River<br /> Valley, Upper San Pedro River Valley, and Upper Santa Cruz River<br /> Valley/Altar Valley. * WHEN...From 11 AM Thursday to 8 PM MST Sunday. * IMPACTS...Heat related illnesses increase significantly during<br />

Extreme Heat Warning Arizona | Effective 03/17/2026 00:44

Public safety alert, emergency alert, and weather alert<br /> Description:<br /> * WHAT...Dangerously hot conditions with high temperatures of 100 to<br /> 108 degrees expected. The hottest days are currently expected to be<br /> Friday March 20 and Saturday March 21. * WHERE...South Central Pinal County, Southeast Pinal County, Tohono<br /> O'odham Nation, Tucson Metro Area, and Western Pima County. * WHEN...From 11 AM Thursday to 8 PM MST Sunday. * IMPACTS...Heat related illnesses increase significantly during<br /> extreme heat events.
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