As North America experiences one of its hottest weeks ever, concerns about the impact of extreme heat on the upcoming FIFA World Cup are becoming increasingly relevant. Several host cities, such as Toronto, Kansas City, Miami, and Philadelphia, face potential heat safety issues for this week's knockout matches. Forecasters predict temperatures exceeding 43 degrees Celsius (110 degrees Fahrenheit) in some cities, raising concerns about player and fan welfare. FIFA is taking steps to mitigate the risks, such as shortening the operating hours of Fan Festivals and providing shade, misting stations, and cooling zones for spectators. However, outdoor stadiums in Toronto, Philadelphia, and Kansas City lack built-in climate control, potentially exposing thousands of fans to high temperatures during matches. Indoor matches are not immune either, as the walk to the stadium can pose its own risks due to heat from the pavement. FIFA has implemented mandatory hydration breaks and other measures to protect players and staff, but critics argue that these breaks disrupt the flow of the game. Health experts advise fans to stay hydrated, limit alcohol consumption, take breaks in shade or air conditioning, and avoid prolonged exposure to sunlight. Medical teams will be stationed at FIFA Fan Festival sites and around stadiums to respond to heat-related illnesses. Some host cities have also expanded access to shade, cooling areas, and free water for fans and workers. Experts stress the importance of recognizing warning signs such as dizziness, confusion, severe fatigue, or lack of sweating.