Overview
- Extreme Heat Warnings remain in effect across much of central, southern and western Arizona through Saturday evening, keeping daytime highs regularly above 110°F.
- Phoenix reached 117°F this week, tying a daily record from 2011, and has recorded an unusually large number of 115°F-or-hotter days this year.
- Nighttime temperatures have stayed high, with Phoenix logging its 24th low of at least 90°F this year, increasing cumulative heat stress for residents and infrastructure.
- Forecasts show monsoon moisture increasing late this week, raising the chance of scattered thunderstorms and localized flash flooding to around 40% by late Saturday into Sunday while daytime highs slip toward the low 100s early next week.
- Officials have issued ozone pollution alerts and are urging use of cooling centers, hydration, limiting midday outdoor activity, and preparedness for sudden storms that can cause strong winds, dust, service outages, and flooding.