On Wednesday, July 8, 2026, Phoenix steps straight into the oven. Mostly clear skies are letting the sun do its worst, with daytime highs expected to hit about 113°F. Overnight, there is almost no relief, with lows only slipping into the upper 80s to near 90°F in central Phoenix, which means the city stays uncomfortably warm through Thursday, July 9. Heat-index values are expected to climb into the lower 110s during the hottest afternoon hours.
Extreme Heat Warning
The National Weather Service has an Extreme Heat Warning in place for the Phoenix metropolitan area until 8 p.m. MST on Thursday, July 9, calling the event a "major Heat Risk" with afternoon temperatures of 111–115°F and a likely increase in heat-related illnesses, according to NWS Phoenix. Outdoor workers, older adults, infants and anyone without reliable air conditioning are being urged to take extra precautions and skip strenuous activity during the hottest part of the day.
Heat Relief and Trail Restrictions
The City of Phoenix is running cooling centers, hydration stations and respite locations across the metro area and has restricted certain trails during the hottest hours for public safety. Residents can call 2‑1‑1 for help finding a location or arranging transport, per the City of Phoenix. Many sites are offering extended hours, water and a cool place to rest during peak heat, but it is smart to check with operators before heading out.
Plan Ahead
Shift any heavy outdoor work to early morning or evening whenever possible, build in frequent shaded breaks and drink plenty of water throughout the day. Keep an eye out for signs of heat exhaustion, including heavy sweating, weakness or nausea, and call 911 if someone shows confusion or loses consciousness. Employers and crews are urged to stick to rest-break guidelines and keep emergency plans ready to go.
Looking Ahead
The ridge responsible for the current blast of heat is expected to shift late in the week, which should allow daytime highs to ease a bit by Friday. By Sunday, monsoon moisture is forecast to return, bringing a growing chance of isolated storms and gusty outflow winds. Anyone with outdoor plans should keep an eye on updated forecasts and follow any new advisories or warnings.
