The worst heat was felt in southern Europe, while punishing temperatures were forecast to reach 104 degrees Fahrenheit in Paris and remain unusually high in Belgium and the Netherlands.

In Paris, blistering heat led the Eiffel Tower to close its summit and remind prospective visitors to take precautions. In London, the Wimbledon tennis tournament saw its hottest opening day on record,

A marine heat wave in the Mediterranean is combining with a powerful heat dome to cause Europe to swelter under a brutal early summer heat wave.