PORTSMOUTH, England, May 16 -- The University of Portsmouth issued the following news: * * * Weak FIFA World Cup heat safety guidelines "impossible to justify" say leading health experts Physiology expert Mike Tipton has signed an open letter urging FIFA to address dangerous heat stress risk * Open letter signed by experts in health, sports performance and climate urges FIFA to address dangerous heat stress risk for players in the men's 2026 World Cup. * FIFA's current safe levels for play  more