Brutkey

Zack Labe
@ZLabe@fediscience.org

Phoenix, Arizona set a new all-time August high temperature earlier this week, with a clear climate change connection as our Climate Shift Index (CSI) system reached level 5 across nearly the entire Southwest.

Find daily CSI information for your hometown at https://csi.climatecentral.org/climate-shift-index.

Map depicting a CSI value of 5 for Phoenix, Arizona, on August 7, 2025, with dark red tones showing strong climate change influence. Phoenix reached a new all-time high of 118°F. An icon of intense sunlight reinforces the severity of the event, with the Climate Shift Index panel emphasizing that such an extreme temperature would be at least 5 times more likely due to climate change.