England will head into unknown territory at this World Cup when they face Norway in Miami - playing in searing temperatures.

The roof at the Hard Rock Stadium reduces the airflow and exacerbates the conditions England head into unknown territory at this World Cup when they face Norway in Miami on Saturday - playing in searing temperatures. Their schedule has included indoor matches in Dallas and Atlanta, and the three they have played outdoors - in Boston, New Jersey and Mexico City - have been in cooler, damper conditions. That changes on Saturday for their quarter-final tie (kick off 22:00 BST), which could be played in conditions the global players' union considers too dangerous for the game to go ahead. Norway have played all but one of their matches outdoors - the exception being their last-32 victory over Ivory Coast in the air-conditioned Dallas Stadium. Their 2-1 victory over Brazil on Sunday was played outside while New Jersey was under a US National Weather Service (NWS) extreme heat warning. The NWS is warning of a "hazardous heat threat", with the chance of heat-related illnesses likely to increase. While air temperatures are likely to sit about 33C (91F), once you add in the humidity, it will feel like about 41C (106F).