Grand Canyon, Arizona
Regional Weather Alerts
| Alert: | Extreme Heat Warning |
| Area(s): | Western Pima County Including Ajo/Organ Pipe Cactus National Monument; Tohono O'odham Nation including Sells; Tucson Metro Area including Tucson/Green Valley/Marana/Vail; South Central Pinal County including Eloy/Picacho Peak State Park; Southeast Pinal County including Kearny/Mammoth/Oracle; Upper Gila River and Aravaipa Valleys including Clifton/Safford |
| Effective: | 2026-07-09 @ 6:13 am -> 2026-07-09 @ 10:00 pm |
| Onset: | 2026-07-09 @ 6:13 am -> 2026-07-09 @ 10:00 pm |
| Severity: | Severe |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Tucson AZ on 2026-07-09 @ 6:13 am |
| Headline: | Extreme Heat Warning issued July 9 at 4:13AM MST until July 9 at 8:00PM MST by NWS Tucson AZ |
| Description: |
* WHAT...Dangerously hot conditions with temperatures of 107 to 112 degrees. * WHERE...South Central Pinal County, Southeast Pinal County, Tohono O'odham Nation, Tucson Metro Area, Upper Gila River Valley, and Western Pima County. * WHEN...Until 8 PM MST this evening. * IMPACTS...Heat related illnesses increase significantly during extreme heat events. |
| Alert: | Extreme Heat Warning |
| Area(s): | Aguila Valley; Tonopah Desert; Gila Bend; Cave Creek/New River; New River Mesa; Rio Verde/Salt River; Fountain Hills/East Mesa; Northwest Pinal County; West Pinal County; Apache Junction/Gold Canyon; Sonoran Desert Natl Monument; San Carlos; Globe/Miami |
| Effective: | 2026-07-09 @ 12:56 am -> 2026-07-09 @ 4:00 pm |
| Onset: | 2026-07-09 @ 12:56 am -> 2026-07-09 @ 10:00 pm |
| Severity: | Severe |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Phoenix AZ on 2026-07-09 @ 12:56 am |
| Headline: | Extreme Heat Warning issued July 8 at 10:56PM MST until July 9 at 8:00PM MST by NWS Phoenix AZ |
| Description: |
* WHAT...Dangerously hot conditions. Afternoon temperatures 108 to 114. Major Heat Risk. Overexposure can cause heat cramps and heat exhaustion to develop and, without intervention, can lead to heat stroke. * WHERE...A portion of south central Arizona. * WHEN...Until 8 PM MST Thursday. * 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. * ADDITIONAL DETAILS...In Maricopa County, call 2-1-1 to find a free cooling center, transportation, water, and more. http://www.maricopa.gov/heat |
| Alert: | Extreme Heat Warning |
| Area(s): | Kofa; Yuma; Central La Paz; Gila River Valley; Chuckwalla Mountains; Imperial County Southeast; Chiriaco Summit |
| Effective: | 2026-07-09 @ 12:56 am -> 2026-07-09 @ 4:00 pm |
| Onset: | 2026-07-09 @ 12:56 am -> 2026-07-09 @ 10:00 pm |
| Severity: | Severe |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Phoenix AZ on 2026-07-09 @ 12:56 am |
| Headline: | Extreme Heat Warning issued July 8 at 10:56PM MST until July 9 at 8:00PM MST by NWS Phoenix AZ |
| Description: |
* WHAT...Dangerously hot conditions. Afternoon temperatures 109 to 116. Major Heat Risk. Overexposure can cause heat cramps and heat exhaustion to develop and, without intervention, can lead to heat stroke. * WHERE...In Arizona, Central La Paz, Gila River Valley, Kofa, and Yuma. In California, Chuckwalla Mountains, Imperial County Southeast, and Chiriaco Summit. * WHEN...Until 8 PM MST /8 PM PDT/ Thursday. * 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. |
| Alert: | Extreme Heat Warning |
| Area(s): | Northwest Valley; Buckeye/Avondale; Deer Valley; Central Phoenix; North Phoenix/Glendale; Scottsdale/Paradise Valley; East Valley; South Mountain/Ahwatukee; Southeast Valley/Queen Creek |
| Effective: | 2026-07-09 @ 12:56 am -> 2026-07-09 @ 4:00 pm |
| Onset: | 2026-07-09 @ 12:56 am -> 2026-07-10 @ 10:00 pm |
| Severity: | Severe |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Phoenix AZ on 2026-07-09 @ 12:56 am |
| Headline: | Extreme Heat Warning issued July 8 at 10:56PM MST until July 10 at 8:00PM MST by NWS Phoenix AZ |
| Description: |
* WHAT...Dangerously hot conditions. Afternoon temperatures 110 to 115. Major Heat Risk. Overexposure can cause heat cramps and heat exhaustion to develop and, without intervention, can lead to heat stroke. * WHERE...Buckeye/Avondale, Central Phoenix, Deer Valley, East Valley, North Phoenix/Glendale, Northwest Valley, Scottsdale/Paradise Valley, South Mountain/Ahwatukee, and Southeast Valley/Queen Creek. * WHEN...Until 8 PM MST 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. * ADDITIONAL DETAILS...In Maricopa County, call 2-1-1 to find a free cooling center, transportation, water, and more. http://www.maricopa.gov/heat |
| Alert: | Extreme Heat Warning |
| Area(s): | Parker Valley; Imperial County Southwest; Imperial County West; Imperial Valley; Palo Verde Valley; Chuckwalla Valley |
| Effective: | 2026-07-09 @ 12:56 am -> 2026-07-09 @ 4:00 pm |
| Onset: | 2026-07-09 @ 1:00 am -> 2026-07-10 @ 10:00 pm |
| Severity: | Severe |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Phoenix AZ on 2026-07-09 @ 12:56 am |
| Headline: | Extreme Heat Warning issued July 8 at 10:56PM MST until July 10 at 8:00PM MST by NWS Phoenix AZ |
| Description: |
* WHAT...Dangerously hot conditions. Afternoon temperatures 111 to 116 expected. Major Heat Risk. Overexposure can cause heat cramps and heat exhaustion to develop and, without intervention, can lead to heat stroke. * WHERE...In Arizona, Parker Valley. In California, Chuckwalla Valley, Imperial County Southwest, Imperial County West, Imperial Valley, and Palo Verde Valley. * WHEN...Until 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. |
| Alert: | Extreme Heat Warning |
| Area(s): | Grand Canyon Country |
| Effective: | 2026-07-08 @ 2:55 pm -> 2026-07-12 @ 10:00 pm |
| Onset: | 2026-07-08 @ 2:55 pm -> 2026-07-12 @ 10:00 pm |
| Severity: | Severe |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Flagstaff AZ on 2026-07-08 @ 2:55 pm |
| Headline: | Extreme Heat Warning issued July 8 at 12:55PM MST until July 12 at 8:00PM MST by NWS Flagstaff AZ |
| Description: |
* WHAT...Dangerously hot conditions expected below 4000 feet, with daytime temperatures ranging from 100 to 104 degrees at Havasupai Gardens and 112 to 116 degrees at Phantom Ranch. * WHERE...Grand Canyon Country. * WHEN...Until 8 PM MST Sunday. * IMPACTS...Most individuals will be at risk for heat-related illnesses without effective cooling or adequate hydration, especially with prolonged outdoor exposure. |
| Alert: | Extreme Heat Warning |
| Area(s): | Marble and Glen Canyons |
| Effective: | 2026-07-08 @ 2:55 pm -> 2026-07-12 @ 10:00 pm |
| Onset: | 2026-07-11 @ 1:00 pm -> 2026-07-12 @ 10:00 pm |
| Severity: | Severe |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Flagstaff AZ on 2026-07-08 @ 2:55 pm |
| Headline: | Extreme Heat Warning issued July 8 at 12:55PM MST until July 12 at 8:00PM MST by NWS Flagstaff AZ |
| Description: |
* WHAT...Dangerously hot conditions, with temperatures 104 to 108 expected. * WHERE...Marble and Glen Canyons. * WHEN...From 11 AM MST /noon MDT/ Saturday to 8 PM MST /9 PM MDT/ Sunday. * IMPACTS...Most individuals will be at risk for heat-related illnesses without effective cooling or adequate hydration, especially with prolonged outdoor exposure. |