Heat dome brings extreme temperatures to World Cup venues

A dangerous and widespread heat wave is descending upon the central and eastern United States and parts of Canada, posing a significant challenge to the ongoing FIFA World Cup as it enters its knockout stages. The weather phenomenon, known as a heat dome, is expected to bring dangerously high temperatures and humidity to several host cities with open-air stadiums, including Kansas City, Philadelphia, Boston, and East Rutherford, New Jersey.

Forecasters warn that heat index values, which combine temperature and humidity, could soar as high as 43.9 degrees Celsius (111 degrees Fahrenheit) in Boston and reach between 40.6 and 43.3 degrees Celsius (105-110°F) in Kansas City, Philadelphia, and New York. The National Weather Service has issued extreme heat watches and warnings for these regions, stating the conditions can be deadly without adequate cooling and hydration and may strain infrastructure. The oppressive heat is forecast to persist through the Fourth of July holiday weekend.

The extreme conditions present a dual challenge for the tournament, affecting both players and spectators. For athletes, the primary risk is exertional heat illness, where intense physical activity in...