Name: Heat in Arizona, June 1 to 4, 2025
Start: 2025-06-01T13:00
End: 2025-06-04T20:00
Location: Arizona

Where it happened

Every event with a place to put it; 2 filed by county or forecast zone are drawn at its center, in a lighter ring. Tap one for its entry below.

Tornadoes
Tropical storms and surge
Floods
Wind
Hail
Winter weather
Heat and drought
Cold
Fire, smoke and dust
Marine and coastal
Other

Open the live radar over this ground

The toll

Deaths: 2
Injuries: 0
Property damage: None recorded
Crop damage: None recorded
Events: 2

Deaths and injuries are direct and indirect together, as the offices filed them. Damage is property and crops in the dollars of the year, not adjusted for inflation, and only where an office estimated it.

What happened

The episode as NWS TWC wrote it up.

Temperatures in Southeastern Arizona were near normal, causing Low HeatRisk. The Pima County Medical Examiner found that the cause of death for 2 individuals, one in Tucson was heat caused and one in Bylas was heat contributed.

What forecasters said that day

The local office's own words before the first event, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Tucson, AZ wrote its last area forecast discussion before the first event at Jun 1, 2:09 AM MST, 10 hours 51 minutes earlier.

Area forecast discussion, Jun 1, 2:09 AM MST, 10 hours 51 minutes before

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The radar

The national radar mosaic for the moment the first event began.

Open the radar archive at this moment

Event by event

2 heat. Local standard time, as filed.

Heat, Upper Gila River and Aravaipa Valleys

When: June 1, 1:00 PM MST to 2:00 PM MST
Where: Upper Gila River and Aravaipa Valleys forecast zone
Deaths: 0 direct, 1 indirect
Reported by: County Official
Coordinates: 33.074, -109.563 (the zone’s center; the record gives no point)

High temperatures in Southeastern Arizona were 4 degrees below normal and a low temperature 8 degrees above normal, causing Low HeatRisk. The Black Hills RAWS near Bylas reached a high temperature of 95 degrees Fahrenheit. The Pima County Medical Examiner found that the cause of death for an individual in Bylas to be heat contributed.

Heat, Tucson Metro Area

When: June 4, 10:00 AM MST to 8:00 PM MST
Where: Tucson Metro Area forecast zone
Deaths: 1 direct, 0 indirect
Reported by: County Official
Coordinates: 32.097, -111.790 (the zone’s center; the record gives no point)

High temperatures in Southeastern Arizona were 4 degrees below normal and a low temperature 6 degrees above normal, causing Low HeatRisk. Tucson International airport reached a high temperature of 94 degrees Fahrenheit. The Pima County Medical Examiner found that the cause of death for an individual in Tucson was heat caused.

The people who died

As the offices recorded each death: direct deaths were caused by the weather itself, indirect ones by something it set in motion.

Event	Date	Age	Sex	Where	Kind
Heat, Upper Gila River and Aravaipa Valleys	2025-06-01	63	Male	Permanent Home	Indirect
Heat, Tucson Metro Area	2025-06-04	66	Male	Permanent Home	Direct

What these are

Heat: Heat below excessive heat criteria that still caused deaths, injuries or significant impacts.

After NWS Directive 10-1605, the rules offices file Storm Data by.

The same day elsewhere

More

Every storm in Arizona in 2025 Every state in 2025 This day in weather history Warnings in Arizona, June 2025

Sources

NOAA National Centers for Environmental Information, Storm Events Database, compiled from the National Weather Service’s monthly Storm Data. Complete through 2026-06; NCEI adds each month about 75 days after it ends and revises past years a few times a year. Rebuilt 2026-10-01. Each event’s entry at NCEI: 1271094, 1271097.