England faces a new challenge in their World Cup quarter-final against Norway in Miami, as they will play in searing temperatures for the first time in the tournament. The Three Lions have been largely shielded from extreme heat, playing indoor matches in Dallas and Atlanta and outdoor games in cooler conditions. The match on Saturday could be played in conditions the global players' union considers too dangerous, with the Wet Bulb Globe Temperature (WBGT) index calculated at 28-30C, above the 28C threshold where Fifpro recommends delaying or postponing matches. Conditions in Miami are expected to be hot and humid, with air temperatures around 33C (91F) feeling like 41C (106F) with humidity. The National Weather Service has issued a heat advisory, and there is a risk of thunderstorms. While two of England's group-stage matches were in hotter climates, they were played in air-conditioned stadiums set to 21C. The warmest England has played outdoors was 25C against Panama, with overcast skies. Norway may be better prepared for the heat, having played all but one of their matches outdoors. They experienced oppressive conditions in their 2-1 victory over Brazil in New Jersey, which was under an extreme heat warning. England's initial base in the United States was in Florida, where they spent 10 days and played warm-up games in Tampa and Orlando, which may provide some acclimatization.