ALAIN JOCARD/AFP/Getty Images

ALAIN JOCARD/AFP/Getty Images(PARIS) — Paris experienced its hottest day on record Thursday, as authorities warned the extreme heat could pose a threat to the rebuilding work at Notre Dame Cathedral.

The temperature rose to a sweltering 107 degrees at the peak of the heat in the afternoon. That means July 25, 2019, will go down in history as the hottest day the French capital ever recorded, smashing the previous record of 104.7 degrees set in 1947, according to Meteo-France, the national meteorological service.

#Canicule De très nombreux records absolus de températures maximales sont battus depuis le début d’après-midi et les températures continuent à monter. Ci-dessous quelques valeurs provisoires mesurées à 15h pic.twitter.com/0rdoRxBBHI

— Météo-France (@meteofrance) July 25, 2019

Much of the city center, usually abuzz with tourists, remained empty as temperatures soared around mid-afternoon. Public health authorities have issued several warnings to stay away from the sun during the hottest parts of the day.