Extreme Heat Warnings in Arizona: every notice

May 8, 2026 to October 7, 2026

1. May 8, 2026 Extreme Heat Warning: Northwest Valley, Buckeye/Avondale, Deer Valley and 6 more, AZ Northwest Valley, Buckeye/Avondale, Deer Valley and 6 more expired
2. May 9, 2026 Extreme Heat Warning: Northwest Valley, Buckeye/Avondale, Deer Valley and 6 more, AZ Northwest Valley, Buckeye/Avondale, Deer Valley and 6 more expired
3. May 9, 2026 Extreme Heat Warning: Parker Valley, Yuma, Imperial Valley and 2 more, AZ and CA Parker Valley, Yuma, Imperial Valley and 2 more expired
4. June 10, 2026 Extreme Heat Warning: Grand Canyon Country, AZ Grand Canyon Country expired
5. June 15, 2026 Extreme Heat Warning: Grand Canyon Country, AZ Grand Canyon Country expired
6. June 20, 2026 Extreme Heat Warning: Grand Canyon Country, AZ Grand Canyon Country expired
7. June 22, 2026 Extreme Heat Warning: Tucson Metro Area including Tucson/Green Valley/Marana/Vail, Southeast Pinal County including Kearny/Mammoth/Oracle, Upper San Pedro River Valley including Sierra Vista/Benson an Tucson Metro Area including Tucson/Green Valley/Marana/Vail, Southeast Pinal County including Kearny/Mammoth/Oracle, Upper San Pedro River Valley including Sierra Vista/Benson and 1 more expired
8. June 22, 2026 Extreme Heat Warning: San Carlos, AZ San Carlos expired
9. June 22, 2026 Extreme Heat Warning: Northwest Valley, Buckeye/Avondale, Deer Valley and 6 more, AZ Northwest Valley, Buckeye/Avondale, Deer Valley and 6 more expired
10. June 22, 2026 Extreme Heat Warning: Parker Valley, Yuma, Central La Paz and 1 more, AZ and CA Parker Valley, Yuma, Central La Paz and 1 more expired
11. June 23, 2026 Extreme Heat Warning: Tucson Metro Area including Tucson/Green Valley/Marana/Vail, Southeast Pinal County including Kearny/Mammoth/Oracle, Upper San Pedro River Valley including Sierra Vista/Benson an Tucson Metro Area including Tucson/Green Valley/Marana/Vail, Southeast Pinal County including Kearny/Mammoth/Oracle, Upper San Pedro River Valley including Sierra Vista/Benson and 1 more expired
12. July 5, 2026 Extreme Heat Warning: 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 and 3 mo 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 and 3 more expired
13. July 5, 2026 Extreme Heat Warning: Aguila Valley, Tonopah Desert, Gila Bend and 10 more, AZ Aguila Valley, Tonopah Desert, Gila Bend and 10 more expired
14. July 5, 2026 Extreme Heat Warning: Northwest Valley, Buckeye/Avondale, Deer Valley and 6 more, AZ Northwest Valley, Buckeye/Avondale, Deer Valley and 6 more expired
15. July 5, 2026 Extreme Heat Warning: Parker Valley, Kofa, Yuma and 10 more, AZ and CA Parker Valley, Kofa, Yuma and 10 more expired
16. July 6, 2026 Extreme Heat Warning: 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 and 3 mo 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 and 3 more expired
17. July 8, 2026 Extreme Heat Warning: Marble and Glen Canyons, AZ Marble and Glen Canyons expired
18. July 8, 2026 Extreme Heat Warning: Parker Valley, Imperial County Southwest, Imperial County West and 3 more, AZ and CA Parker Valley, Imperial County Southwest, Imperial County West and 3 more expired
19. July 9, 2026 Extreme Heat Warning: Northwest Valley, Buckeye/Avondale, Deer Valley and 6 more, AZ Northwest Valley, Buckeye/Avondale, Deer Valley and 6 more expired
20. July 9, 2026 Extreme Heat Warning: Parker Valley, Imperial County Southwest, Imperial County West and 3 more, AZ and CA Parker Valley, Imperial County Southwest, Imperial County West and 3 more expired
21. July 13, 2026 Extreme Heat Warning: Parker Valley, Yuma, Imperial County Southwest and 6 more, AZ and CA Parker Valley, Yuma, Imperial County Southwest and 6 more expired
22. July 21, 2026 Extreme Heat Warning: Lake Havasu and Fort Mohave, Lake Mead - AZ side, Lake Mohave - AZ side and 13 more, AZ and CA Lake Havasu and Fort Mohave, Lake Mead - AZ side, Lake Mohave - AZ side and 13 more expired
23. July 22, 2026 Extreme Heat Warning: Upper Santa Cruz River and Altar Valleys including Nogales, Upper San Pedro River Valley including Sierra Vista/Benson and Eastern Cochise County Below 5000 Feet including Dougla Upper Santa Cruz River and Altar Valleys including Nogales, Upper San Pedro River Valley including Sierra Vista/Benson and Eastern Cochise County Below 5000 Feet including Douglas/Willcox expired
24. July 22, 2026 Extreme Heat Warning: 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 and 3 mo 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 and 3 more expired
25. July 23, 2026 Extreme Heat Warning: Tonto Basin, San Carlos, Dripping Springs and 1 more, AZ Tonto Basin, San Carlos, Dripping Springs and 1 more expired
26. July 23, 2026 Extreme Heat Warning: Grand Canyon Country, AZ Grand Canyon Country expired
27. July 23, 2026 Extreme Heat Warning: Marble and Glen Canyons, AZ Marble and Glen Canyons expired
28. July 25, 2026 Extreme Heat Warning: Yavapai County Valleys and Basins, AZ Yavapai County Valleys and Basins expired
29. July 25, 2026 Extreme Heat Warning: Lake Havasu and Fort Mohave, Lake Mead - AZ side, Lake Mohave - AZ side and 13 more, AZ and CA Lake Havasu and Fort Mohave, Lake Mead - AZ side, Lake Mohave - AZ side and 13 more expired
30. July 27, 2026 Extreme Heat Warning: 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 and 6 mor 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 and 6 more expired
31. July 27, 2026 Extreme Heat Warning: Grand Canyon Country, AZ Grand Canyon Country expired
32. July 27, 2026 Extreme Heat Warning: Marble and Glen Canyons and Oak Creek and Sycamore Canyons, AZ Marble and Glen Canyons and Oak Creek and Sycamore Canyons expired
33. July 27, 2026 Extreme Heat Warning: Yavapai County Valleys and Basins, AZ Yavapai County Valleys and Basins expired
34. July 27, 2026 Extreme Heat Warning: Aguila Valley, Tonopah Desert, Gila Bend and 6 more, AZ Aguila Valley, Tonopah Desert, Gila Bend and 6 more expired
35. July 27, 2026 Extreme Heat Warning: Kofa, Central La Paz, Southeast Yuma County and 9 more, AZ and CA Kofa, Central La Paz, Southeast Yuma County and 9 more expired
36. July 27, 2026 Extreme Heat Warning: New River Mesa, Rio Verde/Salt River, Superior and 7 more, AZ New River Mesa, Rio Verde/Salt River, Superior and 7 more expired
37. July 28, 2026 Extreme Heat Warning: Northwest Plateau, Lake Havasu and Fort Mohave, Lake Mead - AZ side and 19 more, AZ and CA Northwest Plateau, Lake Havasu and Fort Mohave, Lake Mead - AZ side and 19 more expired
38. July 28, 2026 Extreme Heat Warning: Northern Gila County, AZ Northern Gila County expired
39. July 30, 2026 Extreme Heat Warning: Northeast Plateaus and Mesas Hwy 264 Northward, Chinle Valley, Little Colorado River Valley in Coconino County and 3 more, AZ Northeast Plateaus and Mesas Hwy 264 Northward, Chinle Valley, Little Colorado River Valley in Coconino County and 3 more expired
40. August 4, 2026 Extreme Heat Warning: Northwest Plateau, Lake Havasu and Fort Mohave, Lake Mead - AZ side and 19 more, AZ and CA Northwest Plateau, Lake Havasu and Fort Mohave, Lake Mead - AZ side and 19 more expired
41. August 4, 2026 Extreme Heat Warning: Grand Canyon Country, AZ Grand Canyon Country expired
42. August 4, 2026 Extreme Heat Warning: Marble and Glen Canyons, AZ Marble and Glen Canyons expired
43. August 8, 2026 Extreme Heat Warning: Aguila Valley, Tonopah Desert, Gila Bend and 6 more, AZ Aguila Valley, Tonopah Desert, Gila Bend and 6 more expired
44. August 8, 2026 Extreme Heat Warning: Parker Valley, Kofa, Yuma and 5 more, AZ and CA Parker Valley, Kofa, Yuma and 5 more expired
45. August 8, 2026 Extreme Heat Warning: Northwest Valley, Buckeye/Avondale, Deer Valley and 6 more, AZ Northwest Valley, Buckeye/Avondale, Deer Valley and 6 more expired
46. August 9, 2026 Extreme Heat Warning: Marble and Glen Canyons and Grand Canyon Country, AZ Marble and Glen Canyons and Grand Canyon Country expired
47. August 15, 2026 Extreme Heat Warning: 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 and 3 mo 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 and 3 more expired
48. August 15, 2026 Extreme Heat Warning: Aguila Valley, Tonopah Desert, Gila Bend and 6 more, AZ Aguila Valley, Tonopah Desert, Gila Bend and 6 more expired
49. August 15, 2026 Extreme Heat Warning: Northwest Valley, Buckeye/Avondale, Deer Valley and 6 more, AZ Northwest Valley, Buckeye/Avondale, Deer Valley and 6 more expired
50. August 15, 2026 Extreme Heat Warning: Parker Valley, Kofa, Yuma and 9 more, AZ and CA Parker Valley, Kofa, Yuma and 9 more expired
51. August 15, 2026 Extreme Heat Warning: San Carlos, AZ San Carlos expired
52. August 17, 2026 Extreme Heat Warning: Lake Havasu and Fort Mohave, Lake Mead - AZ side, Lake Mohave - AZ side and 13 more, AZ and CA Lake Havasu and Fort Mohave, Lake Mead - AZ side, Lake Mohave - AZ side and 13 more expired
53. August 17, 2026 Extreme Heat Warning: Grand Canyon Country, AZ Grand Canyon Country expired
54. August 21, 2026 Extreme Heat Warning: New River Mesa, Rio Verde/Salt River and Superior, AZ New River Mesa, Rio Verde/Salt River and Superior expired
55. August 23, 2026 Extreme Heat Warning: Upper Santa Cruz River and Altar Valleys including Nogales, Upper San Pedro River Valley including Sierra Vista/Benson and Eastern Cochise County Below 5000 Feet including Dougla Upper Santa Cruz River and Altar Valleys including Nogales, Upper San Pedro River Valley including Sierra Vista/Benson and Eastern Cochise County Below 5000 Feet including Douglas/Willcox expired
56. August 24, 2026 Extreme Heat Warning: Grand Canyon Country, AZ Grand Canyon Country expired
57. August 24, 2026 Extreme Heat Warning: Yavapai County Valleys and Basins, AZ Yavapai County Valleys and Basins expired
58. August 24, 2026 Extreme Heat Warning: Tonto Basin, Dripping Springs and Globe/Miami, AZ Tonto Basin, Dripping Springs and Globe/Miami expired
59. August 29, 2026 Extreme Heat Warning: Upper Santa Cruz River and Altar Valleys including Nogales, Upper San Pedro River Valley including Sierra Vista/Benson and Eastern Cochise County Below 5000 Feet including Dougla Upper Santa Cruz River and Altar Valleys including Nogales, Upper San Pedro River Valley including Sierra Vista/Benson and Eastern Cochise County Below 5000 Feet including Douglas/Willcox expired
60. August 29, 2026 Extreme Heat Warning: 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 and 3 mo 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 and 3 more expired
61. September 7, 2026 Extreme Heat Warning: Parker Valley, Central La Paz, Palo Verde Valley and 1 more, AZ and CA Parker Valley, Central La Paz, Palo Verde Valley and 1 more expired
62. September 7, 2026 Extreme Heat Warning: Northwest Valley, Buckeye/Avondale, Cave Creek/New River and 8 more, AZ Northwest Valley, Buckeye/Avondale, Cave Creek/New River and 8 more expired
63. September 7, 2026 Extreme Heat Warning: Kofa, Southeast Yuma County, Gila River Valley and 3 more, AZ Kofa, Southeast Yuma County, Gila River Valley and 3 more expired
64. September 7, 2026 Extreme Heat Warning: Yuma, AZ Yuma expired
65. September 8, 2026 Extreme Heat Warning: Lake Havasu and Fort Mohave, Lake Mead - AZ side, Lake Mohave - AZ side and 9 more, AZ and CA Lake Havasu and Fort Mohave, Lake Mead - AZ side, Lake Mohave - AZ side and 9 more expired
66. September 9, 2026 Extreme Heat Warning: Lake Havasu and Fort Mohave, Lake Mead - AZ side, Lake Mohave - AZ side and 9 more, AZ and CA Lake Havasu and Fort Mohave, Lake Mead - AZ side, Lake Mohave - AZ side and 9 more expired
67. October 6, 2026 Extreme Heat Warning: Parker Valley, Gila River Valley, Palo Verde Valley and 1 more, AZ and CA Parker Valley, Gila River Valley, Palo Verde Valley and 1 more Warning
68. October 6, 2026 Extreme Heat Warning: Yuma, AZ Yuma Warning
69. October 7, 2026 Extreme Heat Warning: Parker Valley, Gila River Valley, Palo Verde Valley and 1 more, AZ and CA Parker Valley, Gila River Valley, Palo Verde Valley and 1 more Warning
70. October 7, 2026 Extreme Heat Warning: Yuma, AZ Yuma Warning
71. October 7, 2026 Extreme Heat Warning: Parker Valley, Gila River Valley, Palo Verde Valley and 1 more, AZ and CA Parker Valley, Gila River Valley, Palo Verde Valley and 1 more Warning
72. October 7, 2026 Extreme Heat Warning: Yuma, AZ Yuma Warning
73. October 7, 2026 Extreme Heat Warning: Parker Valley, Gila River Valley, Palo Verde Valley and 1 more, AZ and CA Parker Valley, Gila River Valley, Palo Verde Valley and 1 more Warning
74. October 7, 2026 Extreme Heat Warning: Yuma, AZ Yuma Warning

More

Extreme Heat Warnings in Arizona