Climate Shift Index Alert

The Southwest United States experienced an extreme heat event from June 6 to June 13, 2024, with human-caused climate change making high temperatures at least five times more likely. The event caused record-setting temperatures in cities like Phoenix and Las Vegas, led to numerous hospitalizations for heat exhaustion, and contributed to wildfires in California.

• Human-caused climate change has made the intense heat in the Southwest U.S. between June 11 and June 13 at least five times more likely, which is categorized as a Climate Shift Index (CSI) level 5 event.
• Approximately 17 million people in the Southwest were expected to experience at least one day of CSI level 5 heat over a three-day period starting June 11.
• The heat event resulted in record-setting high temperatures on June 6 in Phoenix (113°F), Las Vegas (111°F), Reno (98°F), and Flagstaff (91°F), as well as record warm low temperatures in Phoenix (87°F) and Las Vegas (85°F).
• The extreme heat led to significant public health and environmental impacts, including 11 hospitalizations at a rally in Phoenix, numerous hospitalizations in Las Vegas and Clark County, and the burning of over 3,500 acres of agricultural land in California's Central Valley.

APA

Climate Central (2024). Climate Shift Index Alert. https://www.climatecentral.org/climate-shift-index-alert/climate-shift-index-alert-southwest-june-2024

Chicago

Climate Central. Climate Shift Index Alert. 2024. https://www.climatecentral.org/climate-shift-index-alert/climate-shift-index-alert-southwest-june-2024.

Wikipedia

{{cite report |author=Climate Central |title=Climate Shift Index Alert |date=11 June 2024 |url=https://www.climatecentral.org/climate-shift-index-alert/climate-shift-index-alert-southwest-june-2024 |access-date=23 October 2026 |via=Climate Insights Directory}}

BibTeX

@techreport{climatecentral2024climate, author = {{Climate Central}}, title = {{Climate Shift Index Alert}}, institution = {Climate Central}, year = {2024}, month = jun, url = {https://www.climatecentral.org/climate-shift-index-alert/climate-shift-index-alert-southwest-june-2024}, urldate = {2026-10-23}, note = {Indexed by Climate Insights Directory} }