Grand Canyon National Park, 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; Upper Santa Cruz River and Altar Valleys including Nogales; 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 San Pedro River Valley including Sierra Vista/Benson; Eastern Cochise County Below 5000 Feet including Douglas/Willcox; Upper Gila River and Aravaipa Valleys including Clifton/Safford |
| Effective: | 2026-07-30 @ 4:57 am -> 2026-07-30 @ 7:00 pm |
| Onset: | 2026-07-30 @ 12:00 pm -> 2026-08-02 @ 10:00 pm |
| Severity: | Severe |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Tucson AZ on 2026-07-30 @ 4:57 am |
| Headline: | Extreme Heat Warning issued July 30 at 2:57AM MST until August 2 at 8:00PM MST by NWS Tucson AZ |
| Description: |
* WHAT...Dangerously hot conditions with temperatures 101 to 106 in Santa Cruz and Cochise Counties and 107 to 113 elsewhere. Major to Extreme HeatRisk is expected. * WHERE...Eastern Cochise County below 5000 feet, South Central Pinal County, Southeast Pinal County, Tohono O'odham Nation, Tucson Metro Area, Upper Gila River Valley, Upper San Pedro River Valley, Upper Santa Cruz River Valley/Altar Valley, and Western Pima County. * WHEN...From 10 AM this morning to 8 PM MST Sunday. * IMPACTS...Heat related illnesses increase significantly during extreme heat events. * ADDITIONAL DETAILS...Warm overnight low temperatures of 84 to 90 degrees will provide little to no relief from heat overnight. Warmest overnight low temperatures expected in the Western Deserts. |
| Alert: | Flash Flood Warning |
| Area(s): | Coconino, AZ |
| Effective: | 2026-07-30 @ 2:46 am -> 2026-07-30 @ 9:45 am |
| Onset: | 2026-07-30 @ 2:46 am -> 2026-07-30 @ 9:45 am |
| Severity: | Severe |
| Certainty: | Likely |
| Urgency: | Immediate |
| Issued By: | NWS Flagstaff AZ on 2026-07-30 @ 2:46 am |
| Headline: | Flash Flood Warning issued July 30 at 12:46AM MST until July 30 at 7:45AM MST by NWS Flagstaff AZ |
| Description: |
FFWFGZ The National Weather Service in Flagstaff has issued a * Flash Flood Warning for... The Paria River in... Coconino County in north central Arizona... * Until 745 AM MST /845 AM MDT/ Tonight. * At 1246 AM MST /146 AM MDT/, upstream river gauges in Utah indicated a Flash Flood wave moving down the Paria River and into Arizona. Flash flooding is ongoing or expected to begin shortly. HAZARD...Life threatening flash flooding. SOURCE...Gauge indicated. IMPACT...Life threatening flash flooding of areas in and around the Paria River. * Some locations that will experience flash flooding include... Lees Ferry. This includes the Colorado River near mile marker 0. This includes the following recreation areas and campgrounds... Lees Ferry Camp Site. This includes the following creeks, washes and rivers... Colorado River and Paria River. |
| 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: | 2026-07-30 @ 2:21 am -> 2026-07-30 @ 5:30 pm |
| Onset: | 2026-07-30 @ 2:21 am -> 2026-08-02 @ 10:00 pm |
| Severity: | Severe |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Phoenix AZ on 2026-07-30 @ 2:21 am |
| Headline: | Extreme Heat Warning issued July 30 at 12:21AM MST until August 2 at 8:00PM MST by NWS Phoenix AZ |
| Description: |
* WHAT...Dangerously hot conditions. Afternoon temperatures 111 to 117. Major to Extreme Heat Risk. * WHERE...The Phoenix metropolitan area. * WHEN...Until 8 PM MST Sunday. * IMPACTS...Increase in heat related illnesses, including heat cramps, heat exhaustion, and heat stroke. Heat stroke can lead to death. * ADDITIONAL DETAILS...In Maricopa County, Call 2-1-1 to find a free cooling center, transportation, water and more. https://www.maricopa.gov/heat |
| Alert: | Extreme Heat Warning |
| Area(s): | Aguila Valley; Tonopah Desert; Gila Bend; Cave Creek/New River; Fountain Hills/East Mesa; Northwest Pinal County; West Pinal County; Apache Junction/Gold Canyon; Sonoran Desert Natl Monument |
| Effective: | 2026-07-30 @ 2:21 am -> 2026-07-30 @ 5:30 pm |
| Onset: | 2026-07-30 @ 12:00 pm -> 2026-08-02 @ 10:00 pm |
| Severity: | Severe |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Phoenix AZ on 2026-07-30 @ 2:21 am |
| Headline: | Extreme Heat Warning issued July 30 at 12:21AM MST until August 2 at 8:00PM MST by NWS Phoenix AZ |
| Description: |
* WHAT...Dangerously hot conditions. Afternoon temperatures 108 to 118 expected. Major to Extreme Heat Risk. * WHERE...Aguila Valley, Apache Junction/Gold Canyon, Cave Creek/New River, Fountain Hills/East Mesa, Gila Bend, Northwest Pinal County, Sonoran Desert Natl Monument, Tonopah Desert, and West Pinal County. * WHEN...From 10 AM this morning to 8 PM MST Sunday. * IMPACTS...Increase in heat related illnesses, including heat cramps, heat exhaustion, and heat stroke. Heat stroke can lead to death. * ADDITIONAL DETAILS...In Maricopa County, Call 2-1-1 to find a free cooling center, transportation, water and more. https://www.maricopa.gov/heat |
| Alert: | Extreme Heat Warning |
| Area(s): | New River Mesa; Rio Verde/Salt River; Superior; Tonto Basin; Mazatzal Mountains; Pinal/Superstition Mountains; San Carlos; Dripping Springs; Globe/Miami; Southeast Gila County |
| Effective: | 2026-07-30 @ 2:21 am -> 2026-07-30 @ 5:30 pm |
| Onset: | 2026-07-30 @ 12:00 pm -> 2026-08-02 @ 10:00 pm |
| Severity: | Severe |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Phoenix AZ on 2026-07-30 @ 2:21 am |
| Headline: | Extreme Heat Warning issued July 30 at 12:21AM MST until August 2 at 8:00PM MST by NWS Phoenix AZ |
| Description: |
* WHAT...Dangerously hot conditions. Afternoon temperatures 97 to 115 expected. Major to Extreme Heat Risk. * WHERE...Dripping Springs, Globe/Miami, Mazatzal Mountains, New River Mesa, Pinal/Superstition Mountains, Rio Verde/Salt River, San Carlos, Southeast Gila County, Superior, and Tonto Basin. * WHEN...From 10 AM this morning to 8 PM MST Sunday. * IMPACTS...Increase in heat related illnesses, including heat cramps, heat exhaustion, and heat stroke. Heat stroke can lead to death. |
| Alert: | Extreme Heat Warning |
| Area(s): | Parker Valley; Yuma; Imperial Valley; Palo Verde Valley; Chuckwalla Valley |
| Effective: | 2026-07-30 @ 2:21 am -> 2026-07-30 @ 5:30 pm |
| Onset: | 2026-07-30 @ 2:21 am -> 2026-08-02 @ 10:00 pm |
| Severity: | Severe |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Phoenix AZ on 2026-07-30 @ 2:21 am |
| Headline: | Extreme Heat Warning issued July 30 at 12:21AM MST until August 2 at 8:00PM MST by NWS Phoenix AZ |
| Description: |
* WHAT...Dangerously hot conditions. Afternoon temperatures 111 to 120. Major to Extreme Heat Risk. * WHERE...In Arizona, Parker Valley and Yuma. In California, Imperial Valley, and Palo Verde Valley. * WHEN...Until 8 PM MST /8 PM PDT/ Sunday. * IMPACTS...Increase in heat related illnesses, including heat cramps, heat exhaustion, and heat stroke. Heat stroke can lead to death. |
| Alert: | Extreme Heat Warning |
| Area(s): | Kofa; 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; Chiriaco Summit |
| Effective: | 2026-07-30 @ 2:21 am -> 2026-07-30 @ 5:30 pm |
| Onset: | 2026-07-30 @ 12:00 pm -> 2026-08-02 @ 10:00 pm |
| Severity: | Severe |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Phoenix AZ on 2026-07-30 @ 2:21 am |
| Headline: | Extreme Heat Warning issued July 30 at 12:21AM MST until August 2 at 8:00PM MST by NWS Phoenix AZ |
| Description: |
* WHAT...Dangerously hot conditions. Afternoon temperatures 107 to 119 expected. Major to Extreme Heat Risk. * WHERE...Mostly rural portions of southwest Arizona and southeast California, including Joshua Tree National Park. * WHEN...From 10 AM MST /10 AM PDT/ this morning to 8 PM MST /8 PM PDT/ Sunday. * IMPACTS...Increase in heat related illnesses, including heat cramps, heat exhaustion, and heat stroke. Heat stroke can lead to death. |
| Alert: | Extreme Heat Warning |
| Area(s): | Northwest Plateau; Lake Havasu and Fort Mohave; Lake Mead - AZ side; Lake Mohave - AZ side; Hualapai Mountains; Northwest Deserts; Death Valley National Park; Western Mojave Desert; Eastern Mojave Desert, Including the Mojave National Preserve; Morongo Basin; Cadiz Basin; San Bernardino County-Upper Colorado River Valley; Owens Valley South; Owens Valley North; Esmeralda and Central Nye County; Lincoln County; Northeast Clark County; Western Clark and Southern Nye County; Las Vegas Valley; Southern Clark County; Lake Mead - NV side; Lake Mohave - NV side |
| Effective: | 2026-07-29 @ 4:13 pm -> 2026-07-30 @ 12:00 pm |
| Onset: | 2026-07-30 @ 12:00 pm -> 2026-08-02 @ 10:00 pm |
| Severity: | Severe |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Las Vegas NV on 2026-07-29 @ 4:13 pm |
| Headline: | Extreme Heat Warning issued July 29 at 2:13PM PDT until August 2 at 8:00PM PDT by NWS Las Vegas NV |
| Description: |
* WHAT...Dangerously hot conditions with highs 110 to 120 degrees across the Mojave Desert. Highs 100 to 110 degrees across most of the southern Great Basin and Arizona Strip. Little to no overnight relief is expected, particularly in the Mojave Desert where lows of 80 to 95 degrees are forecast. This will result in major to extreme heat risk. * WHERE...Portions of northwest Arizona, southeast California, and south central and southern Nevada. * WHEN...From 10 AM PDT /10 AM MST/ Thursday to 8 PM PDT /8 PM MST/ Sunday. * IMPACTS...Heat related illnesses increase significantly during extreme heat events. |
| Alert: | Extreme Heat Warning |
| Area(s): | Northern Gila County; Yavapai County Valleys and Basins |
| Effective: | 2026-07-28 @ 11:18 pm -> 2026-07-30 @ 2:00 pm |
| Onset: | 2026-07-31 @ 12:00 pm -> 2026-08-02 @ 10:00 pm |
| Severity: | Severe |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Flagstaff AZ on 2026-07-28 @ 11:18 pm |
| Headline: | Extreme Heat Warning issued July 28 at 9:18PM MST until August 2 at 8:00PM MST by NWS Flagstaff AZ |
| Description: |
* WHAT...Dangerously hot conditions, with temperatures around 108 to 115 expected below 4000 feet. * WHERE...northern Gila and Yavapai counties below 4000 feet; including the Verde Valley and Black Canyon City. * WHEN...From 10 AM Friday to 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): | Grand Canyon Country |
| Effective: | 2026-07-28 @ 11:18 pm -> 2026-07-30 @ 2:00 pm |
| Onset: | 2026-07-30 @ 12:00 pm -> 2026-08-02 @ 10:00 pm |
| Severity: | Severe |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Flagstaff AZ on 2026-07-28 @ 11:18 pm |
| Headline: | Extreme Heat Warning issued July 28 at 9:18PM MST until August 2 at 8:00PM MST by NWS Flagstaff AZ |
| Description: |
* WHAT...Dangerously hot conditions expected below 4000 feet, with daytime temperatures ranging from 104 to 109 degrees at Havasupai Gardens, and 112 to 117 degrees at Phantom Ranch. * WHERE...Lower elevations of the Grand Canyon. * WHEN...From 10 AM Thursday to 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; Oak Creek and Sycamore Canyons |
| Effective: | 2026-07-28 @ 11:18 pm -> 2026-07-30 @ 2:00 pm |
| Onset: | 2026-07-31 @ 12:00 pm -> 2026-08-02 @ 10:00 pm |
| Severity: | Severe |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Flagstaff AZ on 2026-07-28 @ 11:18 pm |
| Headline: | Extreme Heat Warning issued July 28 at 9:18PM MST until August 2 at 8:00PM MST by NWS Flagstaff AZ |
| Description: |
* WHAT...Dangerously hot conditions, with temperatures around 105 to 110 expected. * WHERE...Marble Canyon, Glen Canyon, and Oak Creek Canyon; including Page and Sedona. * WHEN...From 10 AM MST /11 AM MDT/ Friday 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. |