Climate Shift Index Alert•June 29, 2026
World Cup Climate Change Matches of the Week: June 30-July 6
World Cup Climate Change Matches of the Week: June 30-July 6
Climate change is shaping week four of the World Cup, as extreme, climate change-driven heat sprawls from Mexico to Canada. Several matches are forecast to be played above 28°C (82.4°F), a temperature associated with declines in athletic performance.
GAMES TO WATCH
Winner Match 74 vs. Winner Match 77 (TBD)
July 4 | 5:00 p.m. ET
Philadelphia Stadium — Philadelphia, PA
Forecast high: 97.1°F (36.2°C); above 82.4°F (28°C) the athlete performance threshold
Departure from normal: 10.3°F (5.7°C)
Climate Shift Index (CSI): 2
Wet bulb temperature: 78.3°F (25.7°C); above the dangerous humid heat threshold; event not possible without climate change influence
Humid heat made at least seven times more likely due to climate change.


Argentina vs. Cape Verde
July 3 | 6:00 p.m. ET
Miami Stadium — Miami Gardens, FL
Forecast high: 85.7°F (29.8°C); above 82.4°F (28°C) the athlete performance threshold
Climate Shift Index (CSI): 1
Wet bulb temperature: 78.1°F (25.6°C); above the dangerous humid heat threshold; event not possible without climate change influence
Humid heat made at least 10 times more likely due to climate change.


Portugal vs. Croatia
July 2 | 5:00 p.m. ET
Toronto Stadium — Toronto, ON
Forecast high: 92.6°F (33.6°C); above 82.4°F (28°C) the athlete performance threshold
Departure from normal: 15.3°F (8.5°C)
Climate Shift Index (CSI): 1
Wet bulb temperature: 79.2°F (26.2°C); above the dangerous humid heat threshold
Humid heat made at least seven times more likely due to climate change.


Other stadiums forecast to experience highs above the performance-impairing heat threshold:
Atlanta Stadium, Houston Stadium, Dallas Stadium, Kansas City Stadium, Los Angeles Stadium, New York New Jersey Stadium.
To stay up to date, visit our World Cup Interactive Hub, where you'll find real-time weather forecasts for stadiums and individual matches. See whether your team will also be competing against the effects of climate change.
