NWS Forecast Office Phoenix, AZ

The Extreme Heat Warning, for primarily lower desert areas of South-Central AZ, including Phoenix, has been extended through Monday. The Extreme Heat Watches for Tuesday-Friday have also been upgraded to Extreme Heat Warnings. High and low temperatures will push the HeatRisk category up to high-end Moderate (Level 2 of 4) with areas of Major (Level 3 of 4). The Major HeatRisk becomes widespread across central AZ on Tuesday and then expands westward into SE CA for the latter half of the workweek, with localized areas of Extreme HeatRisk (Level 4 of 4). Phoenix is forecasted to have record breaking high temperatures during the middle to latter half of the workweek, and our other two climate sites (Yuma and El Centro) will be flirting with high temperature records during the same time frame.