Phoenix is baking under an Extreme Heat Warning on Thursday, June 25, 2026, with highs expected near 110°F and hardly any relief after dark. Temperatures are already climbing this morning and are on track to hit the triple digits by mid‑morning, ramping up the risk of heat‑related illness for outdoor workers, older adults and anyone without reliable air conditioning. Sip water all day, slow down strenuous outdoor plans in the afternoon, and check in on neighbors and pets that might not have a cool place to ride this out.
What To Expect Today
The National Weather Service is calling for mostly sunny skies, a high near 110°F and light south winds this afternoon, with the Extreme Heat Warning staying in place until 8 p.m. MST on Thursday, June 25, 2026, according to NWS Phoenix. Overnight lows are only expected to dip into the mid‑80s to upper‑80s, so the air will stay warm and stuffy even after sunset. If you have to be outside, stick to the shade when you can, drink water frequently and skip heavy-duty chores during the peak heat of the day.
Where To Cool Off
Maricopa County operates a regional Heat Relief Network that includes cooling centers, respite sites and hydration stations; you can call 2‑1‑1 or check the county’s Heat Relief page for specific locations and hours. Maricopa County notes the program runs through September 30; for a deeper look at the broader heat pattern, see our earlier coverage: Valley Of The Sun On Broil. If your home cooling is spotty or nonexistent, sort out transportation ahead of time and double-check a center’s schedule before heading out.
Weekend Fire Weather Outlook
Starting Friday and heading into the weekend, the pattern shifts toward gusty, dry conditions that could help any spark turn into fast-moving fire. Forecasters are warning about Red Flag conditions, with gusts possibly reaching 25–40 mph in some spots Saturday and Sunday. Minimum humidities are expected to fall into the single digits to teens, which supports elevated fire behavior across the region, so skip open burning and follow any local advisories from NWS Phoenix. Plan weekend outdoor plans with breezy, dusty afternoons in mind and nights that are cooler than daytime but still on the warm side.
Bottom line: treat today, Thursday, June 25, 2026, as a high‑risk heat day: move strenuous activity to the coolest hours you can, know your nearest spot to cool off, and call 2‑1‑1 or use county resources if you need shelter from the heat. We will update as warnings change and as local agencies issue new fire‑weather notices.
