Under US rules, even a distant strike can suspend a game – and some will take place in Florida, the thunderstorm state Hot weather will be a major concern at the World Cup, but lightning may also prove a particular problem. Under US safety regulations, a strike within 10 miles (16km) of a stadium triggers a 30-minute suspension of the game, during which players must leave the pitch. The size of the safety zone was dictated by research on the distance that lightning can strike from a storm even with no clouds overhead.