Persistent strong high pressure aloft created an extended period of very hot temperatures in early July across the lower elevations of southeast Arizona. High temperatures were 5 to 14 degrees above normal causing the Major Heat Risk category to be reached and several record high temperatures to be established. A total of 13 heat-related fatalities were reported by the Pima County Medical Examiner.

Excessive Heat in UPPER SANTA CRUZ RIVER AND ALTAR VALLEYS, ARIZONA
From 01-JUL-23 10:00:00 to 08-JUL-23 21:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: County Official

Very hot temperatures of 7 to 10 degrees above normal caused the Major Heat Risk category to be reached the first eight days of July. Record highs of 106 degrees on July 6 and 105 on July 3 and 7 occurred at the Nogales Airport and 106 degrees on July 3 at Sasabe. The hottest temperature was 107 at Sasabe on July 4 and 5. The Pima County Medical Examiner determined that heat was the primary cause of death for one individual found in the desert near Arivaca.

Excessive Heat in TUCSON METRO AREA, ARIZONA
From 01-JUL-23 10:00:00 to 08-JUL-23 21:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: County Official

Very hot temperatures of 5 to 9 degrees above normal caused the Major Heat Risk category to be reached the first eight days of July. High temperatures at the Tucson International Airport ranged from 107 to 110 degrees. While just shy of record levels, 110 was reached on July 2, 3, 6 and 7. The Pima County Medical Examiner determined that heat was the primary cause of death for one individual outside of a commercial building in Littletown. Heat was determined to be a contributing factor for 6 other individuals in Tucson. Three individuals who suffered from heart disease were found in their homes with A/C that had failed or was not on. Three others were found outdoors with complicating factors stemming from drug toxicity.

Excessive Heat in SOUTHEAST PINAL COUNTY, ARIZONA
From 02-JUL-23 10:00:00 to 08-JUL-23 21:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Very hot temperatures of 4 to 7 degrees above normal caused the Major Heat Risk category to be reached across southeast Pinal County July 2-8. High temperatures of 106 on July 6 and 105 on July 7 reached record levels at San Manuel.

Excessive Heat in UPPER SAN PEDRO RIVER VALLEY, ARIZONA
From 03-JUL-23 10:00:00 to 08-JUL-23 21:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: County Official

Very hot temperatures of 4 to 8 degrees above normal caused the Major Heat Risk category to be reached July 3-8. Record highs of 104 degrees on July 7 and 102 on July 8 occurred in Sierra Vista. The hottest temperature was 108 at Cascabel on July 3, 6 and 7. The Pima County Medical Examiner determined that heat was the primary cause of death for one individual found in the desert north of Whetstone on July 4 and for another found on July 8 in their Benson home with an A/C unit that had been turned off. On July 7, heat was found to be a contributing factor for an elderly individual with heart disease found in his front yard in Tombstone, who then died at a nearby hospital.

Excessive Heat in WESTERN PIMA COUNTY, ARIZONA
From 01-JUL-23 10:00:00 to 07-JUL-23 21:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Very hot temperatures of 9 to 14 degrees above normal caused the Major Heat Risk category to be reached across western and central Pima County the first seven days of July. Record highs of 113 degrees on July 1 and 110 on July 6 occurred at Ajo, but the hottest temperature was 114 on July 3. Organ Pipe Cactus National Monument topped at 109 degrees on July 3 and 5 and Sells reached 108 on July 1 and 3.

Excessive Heat in SOUTH CENTRAL PINAL COUNTY, ARIZONA
From 01-JUL-23 10:00:00 to 09-JUL-23 21:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Very hot temperatures of 5 degrees above normal caused the Major Heat Risk category to be reached across south central Pinal County the first nine days of July. Picacho Peak reached 110 degrees on July 2, 3, 4, 7 and 8.

Excessive Heat in UPPER GILA RIVER AND ARAVAIPA VALLEYS, ARIZONA
From 02-JUL-23 10:00:00 to 09-JUL-23 21:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: County Official

Very hot temperatures of 7 to 10 degrees above normal caused the Major Heat Risk category to be reached July 2-9. Record highs of 110 degrees on July 3 and 108 on July 7 occurred at the Safford Airport, 109 degrees on July 2 and 6 at the Safford Ag Station, and 107 degrees on July 7 at Duncan. The Pima County Medical Examiner determined that heat was the primary cause of death for one individual in Thatcher on July 3 who was found in their home with a nonfunctioning A/C unit.

Excessive Heat in TOHONO O ODHAM NATION, ARIZONA
From 01-JUL-23 10:00:00 to 07-JUL-23 21:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Very hot temperatures of 9 to 14 degrees above normal caused the Major Heat Risk category to be reached across western and central Pima County the first seven days of July. Record highs of 113 degrees on July 1 and 110 on July 6 occurred at Ajo, but the hottest temperature was 114 on July 3. Organ Pipe Cactus National Monument topped at 109 degrees on July 3 and 5 and Sells reached 108 on July 1 and 3.

Heat in EASTERN COCHISE COUNTY BELOW 5000 FEET, ARIZONA
From 02-JUL-23 10:00:00 to 02-JUL-23 21:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: County Official

Hot temperatures 3 to 5 degrees above normal caused the Moderate Heat Risk category to be reached on July 2 in eastern Cochise County. Both Willcox and the Bisbee-Douglas Airport topped out at 102 degrees. The Pima County Medical Examiner determined that heat was the primary cause of death for one individual found in the desert near the International Border 20 miles east of Douglas.