June 10 : The World Cup will kick off on Thursday under familiar North American summer threats: extreme heat, suffocating humidity and thunderstorms capable of delaying matches with little warning.Seasonal forecasts indicate above-normal temperatures across large parts of the United States, while moisture flo

June 10 : The World Cup will kick off on Thursday under familiar North American summer threats: extreme heat, suffocating humidity and thunderstorms capable of delaying matches with little warning.Seasonal forecasts indicate above-normal temperatures across large parts of the United States, while moisture flo