Heat Forces Marathon Changes | San Antonio News

Marathons are sweating under the heat — literally. As global temperatures soar, iconic races are scrambling to survive, shifting dates or starting early in the morning just to dodge dangerous heat and humidity. Some events have even been canceled outright, while others, like the Twin Cities Marathon, are daring to hope for snow over 70-degree swelter. With runners generating massive internal heat and sweat failing to evaporate in humid conditions, organizers are forced into bold moves — including letting runners finish early for a medal — sparking debate. Science warns that by 2045, many U.S. marathons may no longer have safe running conditions. This isn’t just about race day — it’s a climate crisis reshaping how we enjoy outdoor activity, forcing organizers to rethink traditions to keep participants safe. Listen in comfort:Get a discount on a Soli Pillow: http://solipillow.com/discount/dnn. Advertise on DNN:[email protected] This is an automated, high-level news summary based on public reporting.Report issues to [email protected]. View sources & latest updates:https://sources.thednn.ai/91445e4b61432174