Prepare for extreme heat early next week

Posted: Updated:
PHOENIX (3TV/CBS 5) -

A major heatwave is moving into Arizona starting today, with Valley temperatures reaching 120 by early next week.

Strong high pressure that tracked into the region from the subtropics is the driving force behind this relatively long-lasting string of some of the hottest temperatures felt in years, statewide.

Excessive Heat Warnings begin Saturday for Greater Phoenix and most of Arizona, with Heat Advisories for some mountain communities.  These alerts will continue through at least Thursday night.

During this time, the public is urged to limit outdoor activity to early morning or late evening hours. Drink more water than usual. Check on elderly family and small children for any signs of heat-related illnesses. Make sure pets have a cool place with water. Have an emergency kit on your car with water and first aid in the event of a breakdown. Wear light-colored, loose-fitting clothing and sunscreen. Those who work outdoors must take frequent breaks in an air conditioned building and continuously hydrate.

[SPECIAL SECTION: Extreme heat]

According to the National Weather Service, the record number of consecutive days at 115 or greater in Phoenix is four. That record could be hit next week. Daily high temperature records are also going to be threatened starting Sunday. The hottest day ever recorded in Phoenix was on June 26, 1990, when Phoenix Sky Harbor reached 122.

Look for a high of 110 in Phoenix Saturday afternoon, with 114 for Father's Day Sunday, 118 Monday, 121 Tuesday, 120 Wednesday and 116 Thursday. Lows will be in the 80s and low 90s.

Humidity will be low, and skies will be generally sunny, but higher dew points moving into the high country from the northeast on Monday and Tuesday may help produce some dry lightning, increasing the fire danger there.

[SPECIAL SECTION: Weather blogs]

Click/tap here to download the free azfamily mobile app.

Copyright 2017 KPHO/KTVK (KPHO Broadcasting Corporation). All rights reserved.


  • Weather BlogMore>>

  • GONE FISHIN': Best AZ spots to reel in a catch during the fall

    GONE FISHIN': Best AZ spots to reel in a catch during the fall

    Monday, October 16 2017 12:55 PM EDT2017-10-16 16:55:48 GMT
    (Source: 3TV/ CBS 5)(Source: 3TV/ CBS 5)

    As the saying goes, a bad day of fishing is better than a good day at the office. Now that temperatures are cooling down and fish are becoming more active, where are the best lakes to catch them?

    More >

    As the saying goes, a bad day of fishing is better than a good day at the office. Now that temperatures are cooling down and fish are becoming more active, where are the best lakes to catch them?

    More >
  • Flagstaff's fall beauty

    Flagstaff's fall beauty

    Saturday, October 14 2017 3:40 PM EDT2017-10-14 19:40:09 GMT
    (Source: 3TV/CBS 5)(Source: 3TV/CBS 5)

    Some say that Arizona doesn't have season and that we miss out on fall. But anyone who lives here knows that those beautiful fall colors are just a 2-hour drive away to the forests of Flagstaff. 

    More >

    Some say that Arizona doesn't have season and that we miss out on fall. But anyone who lives here knows that those beautiful fall colors are just a 2-hour drive away to the forests of Flagstaff. 

    More >
  • There's a name for the notorious wind that helped fan the Napa area wildfires

    There's a name for the notorious wind that helped fan the Napa area wildfires

    Thursday, October 12 2017 10:42 PM EDT2017-10-13 02:42:50 GMT
    A special wind in northern California is helping fanning the flames of the deadly wildfires. (Source: AP)A special wind in northern California is helping fanning the flames of the deadly wildfires. (Source: AP)

    In southern California, they are known as Santa Ana winds, and in northern California, they are known as Diablo winds. Both can bring the same problems to California.

    More >

    In southern California, they are known as Santa Ana winds, and in northern California, they are known as Diablo winds. Both can bring the same problems to California.

    More >