Tucson, Arizona – Extreme heat is blanketing southern Arizona Monday as temperatures climb into the 108–114°F range, prompting urgent warnings across Tucson, Pinal County, and the Tohono O’odham Nation. The National Weather Service has issued an Extreme Heat Warning in effect from 10 a.m. to 8 p.m. MST, urging residents to stay indoors or seek shade.
According to the National Weather Service in Tucson, heat-related illness risks are elevated across the region as a high-pressure system drives hot, dry air through the Gila River Valley and Tucson metro area. Peak heat index values could exceed 110°F in areas like Marana, Safford, Green Valley, and Picacho Peak.
OSHA advises anyone working outdoors to reschedule strenuous activities for early morning or evening hours. Those experiencing signs of heat exhaustion—dizziness, nausea, or confusion—should get to a shaded or air-conditioned location immediately. Heat stroke is a medical emergency.
Light winds and low humidity will worsen conditions, especially along exposed areas and construction zones. Power demand may also spike as residents turn to air conditioning.
The heat warning remains in effect until 8 p.m. tonight, with more summer heat expected midweek.
Five-Day Forecast – Tucson Area
- Monday: High 111°F, sunny and hot with slight PM storms possible
- Tuesday: High 107°F, 30% chance of afternoon thunderstorms
- Wednesday: High 100°F, 50% chance of storms, partly sunny
- Thursday: High 94°F, scattered PM storms, low 72°F
- Friday: High 93°F, 20% chance of storms, partly cloudy
