With 48 teams competing, the 2026 World Cup is confronting a common adversary: North American summer weather. Matches will be played in 16 cities from southern Mexico to Canada, each location presenting distinct weather risks.
Thunderstorms have already caused disruption before the tournament officially begins. England's training match against Costa Rica in Orlando was delayed by about an hour due to lightning and heavy rain that flooded the pitch. Under safety regulations at U.S. stadiums, play is suspended if lightning is detected within an approximately 13-kilometer radius of the venue, and can only resume 30 minutes after the last thunderclap.
The highest risk of thunderstorms is concentrated in the central, eastern, and southeastern United States. Among host cities, Miami and Houston have the most lightning, though Houston's stadium has a retractable roof. However, the most severe storm threat in the coming days lies in the northeast: scattered storms could bring strong wind gusts and large hail across the northeastern U.S. and southeastern Canada, endangering Friday's match between Canada and Bosnia and Herzegovina in Toronto, as well as Saturday's games in Boston and New York.
The biggest weather challenge for players and spectators is heat and humidity. Temperatures in Monterrey, Mexico, are already high, while humidity in the southeastern U.S. could cause the greatest heat stress, even at lower temperatures. FIFA assesses heat stress risk using the Wet Bulb Globe Temperature (WBGT) index, which combines temperature, humidity, solar radiation, and wind. Many sports physiologists consider a WBGT of 28°C the threshold above which high-intensity competition becomes unsafe; FIFA's threshold for action is 32°C. A 2025 study predicts that 14 of the 16 host cities will exceed 28°C at some point, though some stadiums with roofs and air conditioning can mitigate the heat.
Tropical storms also pose a threat throughout the World Cup. Because the tournament takes place during the early Atlantic hurricane season, most storms are expected to form over the warm waters of the Gulf of Mexico, the Bay of Campeche, and the western Caribbean, rather than the still-cool Atlantic Ocean, making venues in Mexico, Houston, and Miami the highest-risk. The U.S. National Hurricane Center is monitoring a low-pressure area in the Bay of Campeche, rating it as having a low chance of developing into a tropical cyclone before making landfall in eastern Mexico this weekend.
Mexico City faces an additional challenge due to its altitude. At about 2,240 meters above sea level, thinner air reduces oxygen levels, accelerating player fatigue and slowing recovery. Thinner air also creates less drag, potentially altering the flight path of the ball.
Canadian venues are likely to remain relatively cool throughout the tournament with the lowest risk of disruptive storms. The uneven distribution of extreme weather conditions or health impacts has raised questions about competitive fairness.
