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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.

\"PHOTO:
Philippe Lopez/AFP/Getty Images
PHOTO: People cool off at floating pools set up on the Ourcq canal in Paris on July 25, 2019, as a new heatwave hits Europe.
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\"PHOTO:People
Bertrand Guay/AFP/Getty Images
PHOTO:People cool off and sunbathe by the Trocadero Fountains next to the Eiffel Tower in Paris, on July 25, 2019 as a new heatwave hits the French capital.
>

🔴 20 dpts en #vigilanceRouge
🔶 60 dpts en #vigilanceOrange

Restez informés sur https://t.co/rJ24zzmmy4 pic.twitter.com/MnV2Ej6On9

— VigiMétéoFrance (@VigiMeteoFrance) July 25, 2019

However, some Parisians and tourists have been enjoying the day by swimming in the fountains near the Eiffel Tower. The city council opened up town halls and government buildings to be used as air conditioned spaces for people to escape the heat, and a service has been provided to the elderly to drive them to the nearest cool-room at their request, according to local media.

As the heat wave spreads across the whole of Europe, Parisian authorities face a unique problem with regards to Notre Dame, the historic cathedral devastated by a fire in April.

\"PHOTO:
Philippe Wojazer/Reuters
PHOTO: A view shows the damaged roof of Notre-Dame de Paris during restoration work, three months after a fire that devastated the cathedral in Paris, July 14, 2019.
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\"I am very worried about the heat wave,\" Philippe Villeneuve, the chief architect for the cathedral's restoration, told Reuters Wednesday. \"What I fear is that the joints or the masonry, as they dry, lose their coherence, their cohesion and their structural qualities and that all of sudden, the vault gives way.\"

Villeneuve warned that the cathedral's vaulted ceiling \"could well collapse,\" although the cathedral seems to have withstood the heat for the time being.

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