Reports indicate a significant share of matches could face extreme heat. According to multiple sources, approximately 25% of World Cup 2026 matches could be played in extreme heat conditions. However, other reports claim more than one in three matches face dangerous heat risk (western). Both estimates are presented without resolution.

Researchers analysed weather risks for all 104 matches scheduled between 11 June and 19 July 2026 across 16 stadiums in the United States, Canada and Mexico (Brusselstimes.com). The analysis relied on the wet‑bulb globe temperature (WBGT) heat index, which combines air temperature, humidity, sunlight and cloud cover (Brusselstimes.com). Climate change increased heat risks for 97 of the 104 matches (Mainichi).

Forecasts show temperatures could reach 38 °C for the Paraguay vs France World Cup match in Philadelphia (France24). Forecasters said the hottest World Cup tournament match so far could occur during the knockout round game between France and Paraguay in Philadelphia on a Saturday afternoon (Hindu). A triple‑digit heat dome threatens World Cup knockout ties across the United States (DailySabah).

In Orlando, thunderstorms delayed England’s warm‑up match against Costa Rica by about an hour after lightning and heavy rain waterlogged the pitch (Guardian). Safety regulations suspend play when lightning is recorded within roughly eight miles of a stadium and resume 30 minutes after the last strike (Guardian).

Since the United States last hosted the World Cup in 1994, climate change has reshaped the conditions players and fans face, and cities are scrambling to adapt in real time (Politico). An unrelenting heatwave across the United States is forcing everyone, including World Cup organisers, to completely pivot (France24). The locations of several stadiums across the U.S. and Mexico and the peak‑summer timing of the World Cup are expected to put players and fans at risk of overheating (BlueSky).