Swiss climatologist Sonia Seneviratne warns that the heatwave season is expanding, underscoring growing climate risks.

“What we used to call a July phenomenon is now arriving in mid-May", according to one weather forecaster.

Western Europe faces record late-May heat, with France, the UK and Spain sweltering up to 11C above normal and officials warning of rising health risks.

Europe sizzles as record-breaking May heatwave scorches continent-