There are six host cities (Miami, Houston, Dallas, Monterrey, Kansas Metropolis and Atlanta) the place the WBGT may feasibly attain no less than 32C (90F) throughout the afternoon which might be thought of as excessive warmth stress the place the physique actually struggles to maintain itself cool.
To cut back these dangers, matches are typically scheduled outdoors the most popular a part of the day, with many kick-offs going down within the late afternoon or night. Scotland’s group C recreation towards Brazil in Miami, for instance, may have a kick-off time of 18:00 ET (23:00 BST).
Some venues, together with stadiums in Houston and Dallas, even have retractable roofs and local weather management to reasonable situations.
Summer time heatwaves are additionally a typical prevalence in North America and Mexico the place temperatures can rise 10C (50F) or extra above common, doubtlessly pushing situations into far more difficult territory for each gamers and followers.
In New York for instance, the situation of this yr’s World Cup closing on 19 July at 15:00 ET (20:00 BST), a typical heatwave may end in air temperatures within the mid-30sC (mid 90F) and WBGT of round 30C (86F) resulting in excessive warmth stress.