An Extreme Heat Warning has been issued for the Phoenix metro, as well as parts of western Imperial County Sunday and Monday. While overnight lows remain comfortable, afternoon high temperatures will reach a 104-110°F range, with Monday being the hottest and most impactful day. Temperatures will result in widespread moderate HeatRisk with a few areas of major HeatRisk on Monday.
Temperatures will reach their highest levels of 2026 so far on Monday. High temperatures across the lower deserts are forecast to reach 104-110°F on Monday, leading to widespread moderate HeatRisk with a few areas of major HeatRisk, including in the Phoenix metropolitan area.
High temperatures will reach the 100s across the lower deserts then next several days and will be hottest on Monday, pushing close to 110°F in some areas. Temperatures will lead to widespread Moderate HeatRisk each day, with areas of Major HeatRisk on Monday, including in Phoenix.
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