Climate Shift Index Alerts
Using the Climate Shift Index system and map tool, Climate Central issues alerts when there’s a notable extreme weather event around the world that was made more likely by human-caused climate change (although not in every instance). We also produce retrospective analyses to track the local influence of climate change.
Past Climate Shift Index alerts
May 12, 2025: Texas (heat)
April 29, 2025: UK (heat)
April 15, 2025: Norway (heat)
March 25, 2025: Japan (heat, wildfires)
March 13, 2025: Midwest and Deep South (severe weather)
January 31, 2025: Western Australia marine heat wave (ocean warming)
January 24, 2025: Storm Éowyn (ocean warming)
December 23, 2024: UK (winter warmth)
December 17, 2024: Cyclone Chido (ocean warming, cyclones)
November 19, 2024: Philippines (ocean warming)
October 31, 2024: Spain floods (ocean warming, floods)
October 09, 2024: Japan (heat)
October 07, 2024: Hurricane Milton (ocean warming, hurricanes)
September 23, 2024: Hurricane Helene (ocean warming, hurricanes)
August 22, 2024: Brazil (heat, wildfires)
August 21, 2024: Spain (heat)
August 13, 2024: Mediterranean (heat, wildfires)
July 31, 2024: U.S. (heat)
July 18, 2024: Western U.S. (heat)
June 25, 2024: Southern U.S. (heat)
June 11, 2024: Mediterranean, Middle East, and Northern Africa (heat)
June 06, 2024: North America (heat)
May 17, 2024: Western India (heat)
May 13, 2024: Florida (heat)
May 01, 2024: British Columbia (heat, wildfires)
August 23, 2023: Europe (heat)
July 14, 2023: Europe (heat)
July 11, 2023: Spain (heat)
June 29, 2023: Western U.S. (heat)
June 15, 2023: Southwest (heat)
About the Climate Shift Index
Climate Central’s Climate Shift Index, grounded in the latest peer-reviewed science, maps the influence of climate change on temperatures across the globe, every day.
Climate Shift Index levels indicate how much human-caused climate change has altered the frequency of daily temperatures at a particular location. Level 1 indicates that climate change is detectable in that day’s temperature. Level 2 means that climate change made exceptionally warm temperatures in a given location at least twice as likely. Level 5 is the maximum and indicates temperatures at least 5 times more likely because of climate change.
For these analyses, forecast temperatures come from NOAA’s Global Forecast System model, and past actual temperatures come from the ERA5 dataset.