Concerns about major July heat have been present for months during the 2026 FIFA World Cup, and they are now materializing as a powerful heat dome settles over large parts of the United States and Canada. Temperatures are expected to exceed 43 degrees Celsius (110 degrees Fahrenheit) in several host cities, raising potential heat safety issues for knockout matches this week.

Toronto’s health authorities have urged fans attending the Round of 32 match between Portugal and Croatia at Toronto Stadium to stay hydrated and limit alcohol intake following a heat warning from Environment Canada. Michelle Murti, Toronto’s medical officer of health, noted that temperatures could feel like 40C (104F) due to humidity. Despite the stadium's expanded capacity for the World Cup, limited roof coverage means approximately 43,000 fans will be exposed to direct sunlight during the match.

FIFA has responded by strategically limiting outdoor matches during the hottest parts of the day, adjusting kick-off times in certain markets, and prioritizing matches expected in warmer windows for covered stadiums where possible.

This heatwave coincides with the World Cup's critical knockout phase, including high-profile matches such as Portugal versus Croatia, drawing significant attention amid the challenging weather conditions.

Sources