PHOENIX (AZFamily) — An Extreme Heat Watch is in effect for the Valley and parts of western Arizona on Wednesday and Thursday, making both days First Alert Weather Days.
Be sure to stay hydrated and limit prolonged time in the sun, especially between 10 a.m. and 6 p.m.
High temperatures are expected to reach 109° today before climbing to 112° on Tuesday. Our First Alert Days on Wednesday and Thursday are forecast to peak around 113°. So far this year, Phoenix’s hottest day was 112°, recorded on June 16.
Looking ahead to the weekend, a slight dip in the jet stream may bring modest relief. Saturday’s forecast high is 109°, followed by 105° on Sunday.
Humidity is also expected to increase slightly through the middle and end of the week, keeping mornings warmer. Overnight lows Wednesday through Friday will likely stay in the upper 80s.
Elsewhere across Arizona, an Extreme Heat Warning remains in effect for the lower elevations of the Grand Canyon today and Tuesday. Southeast Arizona is under an Extreme Heat Warning Tuesday and Wednesday.
The High Country stays mostly dry today, with a slight chance for thunderstorms developing Tuesday. Storm chances increase a bit more on Wednesday and Thursday, mainly along and north of the Mogollon Rim.
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