Arizona weather forecast: Extreme Heat Warning in effect for Phoenix area
Evening Weather Forecast - 5/11/26
Monday reached a high of 108 in the Valley, and Tuesday is expected to be just as hot. FOX 10's Erica Horvatin has more on when we can expect "cooler" weather to arrive in the state.
PHOENIX - We're starting the work week off quite toasty! An extreme heat warning remains in effect for the Valley through Tuesday evening, as temperatures climb to nearly 110 degrees.
Today:
Monday was the peak of the heat wave, with a high of 109 degrees in Phoenix. Temperatures came just one degree shy of a daily record. The current record was 110, set back in 1934. The average high is around 93 degrees, making this spell well above normal for the date.
On top of that, the air quality was "unhealthy for sensitive groups", due to high levels of ozone pollution during the afternoon and evening. An air quality alert will remain in effect through Tuesday for Maricopa County.
Temperatures will struggle to cool down overnight, with a low of 79 degrees in Phoenix.
The Rest of the Week:
A ridge of high pressure is to blame for the near-record warmth. The ridge, however, is shifting eastward. This means the forecast high will sit near record Tuesday, too, but not by Wednesday.
Tuesday will be a mostly sunny day, with a high of 106 degrees. In the high country, temperatures will hit the 80s and 90s. Temperatures will be near-record for much of Arizona.
A weak passing disturbance passing Tuesday afternoon through Wednesday. As it passes, scattered clouds will surge up from the south over the state. In particular, there will be a low chance for a passing shower Tuesday afternoon in far southern Arizona.
By Wednesday, the low shower chance extends over northern/northeastern Arizona. Scattered clouds will also pass the Valley Tuesday evening into Wednesday. Temperatures will cool down several degrees and clouds will increase.
The forecast high on Wednesday drops to 101 degrees and by Thursday, we fall back into the 90s at 99 degrees. Friday is also forecast to hit 99 degrees. These temperatures will still be above average, but not nearly as hot as the start of the week.
Looking Further Ahead:
The weekend is forecast to sit right near 100 degrees each afternoon.
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The following heat safety information was provided by the Scottsdale Fire Department.
What are Heat Emergencies?
Heat Cramps: Profuse sweating, fatigue, extreme thirst, muscle cramps
Heat Exhaustion: Headache, dizziness, weakness, nausea/vomit, Cool/moist skin
Heat Stroke: Elevated temp. +103degrees, confusion/irrational behavior, dry/hot skin, rapid shallow breathing, rapid weak pulse (shock), seizures, unconscious
What to do
- Get person into shade or cool location.
- Cool person with cool, wet cloths (neck, groin, armpits, head) and fan body.
- Sip cool water if person is alert.
- For muscle cramps, massage muscles gently, but firmly until relaxed.
- *If symptoms worsen, call 911.
What not to do
- Do not give anything by mouth if person is vomiting, unable to swallow or unconscious.
- Do not underestimate the seriousness of a heat emergency.
- Prevention/Preparation for hike/exercise in heat.
Know your limitations
- Hydrate (begins day prior to hike/exercise, hour before hike, during and after).
- Wear proper clothing, lightweight and light color, protect head, proper shoes.
- Always carry a cell phone and best to hike with company.
- Always tell someone where you are hiking and when to plan to return.
Preventing heat exhaustion/heat stroke
The Arizona Department of Health Services stated the following precautions can be taken to prevent heat exhaustion or heat stroke:
- Stay in air-conditioned buildings.
- Find a cooling center/hydration station.
- Limit outdoor activity during the hottest part of the day (mid-day).
- Check on at-risk friends, family, and neighbors at least twice a day.
- Drink water before, during, and after working or exercising outside.
- Check the UV Index.
- Check the heat risk map.
Road Conditions
- Call 511 anywhere in Arizona or 1-888-411-ROAD (7623)
The Source: Information for this article was gathered by the FOX 10 Weather Experts.