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MOST ACCURATE FORECAST: Tracking the return if extreme heat

As high pressure rebuilds, a warming trend begins. Highs will climb back to near-normal by Saturday, with the lower deserts likely hitting 110° or more by Sunday.

Extreme heat returns to the Valley next week

By: Justin Hobbs

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and last updated

PHOENIX — Expect a hot, dry holiday weekend across the Valley and much of Arizona as high pressure strengthens overhead.

As high pressure rebuilds, a warming trend will begin. Highs will climb near 110 degrees in the Valley on Sunday and continue rising into next week.

This weather pattern is also leading to worsening air quality.

An Ozone High Pollution Advisory is in effect for the Valley on Monday. Light winds and sunshine are causing ozone levels to rise, especially during the afternoon hours.

Breathing in ozone pollution can cause chest pain, coughing, throat irritation and difficulty breathing. Children, older adults and people with asthma, COPD or other respiratory issues are most at risk. Try to limit outdoor activity during peak afternoon hours.

To help reduce ozone pollution, consider carpooling, using public transportation, avoiding idling and refueling after sunset.

As high pressure settles over Arizona by midweek, near-record temperatures are possible.

Afternoon highs could reach up to 115 degrees by Wednesday. Heat risk will range from major to extreme for parts of central and southwestern Arizona.

An Excessive Heat Watch is in effect from Tuesday through Thursday for most of Maricopa County and the northwestern portion of Pinal County. Areas below 4,000 feet at the Grand Canyon are also included in the watch.

Remember to limit outdoor activities between 10 a.m. and 6 p.m., stay hydrated with water and electrolytes, bring pets indoors, and check on friends and family to ensure they have adequate cooling. Never leave children or pets in a hot car.

Stay with ABC15 for the latest on the next heat wave.