Will, the owner of a food stall selling cooked turkey, ties a bandana around his head during a heatwave, before serving customers at Whitecross Street Market, in east London, June 26. The U.K. suffered its hottest ever June day on June 25, with temperatures reaching 36.7 degrees Celsius in the southwest, breaking a record set earlier that day as the extreme heat stretched across much of southern England. AFP-Yonhap

BERLIN — Authorities banned alcohol and major weekend festivities as a deadly European heatwave was forecast to shift east on Friday, choking 150 million people under 35C temperatures.

Medics in Britain and France warned hospitals were struggling with the heat and a surge in emergency calls.

German's weather service DWD warned of "severe to extreme heat stress in nearly all parts of the country," with records likely to be broken.

Authorities have reported hundreds of people dead in Spain and others across Europe, including in France, where scores of people drowned and several children died in hot cars.