More Extremely Hot Days

Analysis of 246 U.S. locations shows that 74% have experienced an annual increase in extremely hot days since 1970, with Austin, TX seeing the largest increase. The document highlights that extreme heat risks are higher in traditionally cooler regions due to lack of acclimatization and infrastructure, and that vulnerable populations including children, seniors, and low-income households are disproportionately affected.

• Between 1970 and 2021, 74% (184) of 246 analyzed U.S. locations reported an annual increase in extremely hot days, with 51% (126) of those locations seeing at least seven additional extremely hot days per year.
• Austin, TX experienced the most significant increase in extreme heat, with 43 additional days per year exceeding 100°F.
• The risk of heat-related hospitalizations is higher in traditionally cooler regions, such as the Northwest, West, and Northeast, because residents are less acclimatized and lack infrastructure like central air conditioning.
• Certain populations are more vulnerable to excessive heat, specifically children, athletes, adults over 65, outdoor workers, low income households, and individuals with chronic medical conditions.

APA

Sánchez-Lugo, A., & Holder, C. L. (2022). More Extremely Hot Days. Climate Central. https://www.climatecentral.org/climate-matters/more-extremely-hot-days

Chicago

Sánchez-Lugo, Ahira, and Cheryl L. Holder. More Extremely Hot Days. Climate Central, 2022. https://www.climatecentral.org/climate-matters/more-extremely-hot-days.

Wikipedia

{{cite report |last1=Sánchez-Lugo |first1=Ahira |last2=Holder |first2=Cheryl L. |title=More Extremely Hot Days |publisher=Climate Central |date=29 June 2022 |url=https://www.climatecentral.org/climate-matters/more-extremely-hot-days |access-date=23 October 2026 |via=Climate Insights Directory}}

BibTeX

@techreport{snchezlugo2022more, author = {Sánchez-Lugo, Ahira and Holder, Cheryl L.}, title = {{More Extremely Hot Days}}, institution = {Climate Central}, year = {2022}, month = jun, url = {https://www.climatecentral.org/climate-matters/more-extremely-hot-days}, urldate = {2026-10-23}, note = {Indexed by Climate Insights Directory} }