Arizona weather forecast: Triple-digit heat to persist for Phoenix
Evening Weather Forecast - 3/19/26
The heat wave is expected to peak today and Friday, with an Extreme Heat Warning in effect across the state through Sunday night.
PHOENIX - It was another record-hot day across Arizona. Phoenix reached a high of 105 degrees breaking the old record of 96 degrees. Phoenix also had a record warm morning of 70 degrees.
Flagstaff saw its earliest 80 degree day on record, while Prescott, Sedona and Payson saw their earliest 90 degree days on record.
Tonight:
The peak of the heat wave is today and tomorrow, but the extreme heat warning will remain in effect through Sunday night.
Tonight it will cool to 71 degrees in Phoenix and Friday will reach 106 degrees. The whole state will see another day of record-warm temperatures. This will continue through the weekend as well.
Next week:
Unfortunately, the heat is expected to continue through next weekend, thanks to persistent high pressure. The Valley will see daily highs around 100 degrees through then.
Morning Weather Forecast - 3/19/26
Let's not mince words: We are going to be dealing with triple-digit temperatures for some time.
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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)
- az511.com
The Source: Information for this story was gathered by the FOX 10 Weather Experts.






