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> France has started to ban outdoor events due to heat.
https://www.theguardian.com/world/2003/aug/29/france
Heat wave killed 11,000 in France
Associated Press
Fri 29 Aug 2003 06.20 EDT
France's health ministry today said that there were an estimated 11,435 more deaths during the first two weeks of August than the same period in recent years.
The provisional estimate did not directly blame the deaths on the heat wave but the health minister, Jean-Francois Mattei, said "the human drama linked to [it] hit the weakest people in our society".
As temperatures rose to 40C (104F) in parts of the country there were massive backlogs at morgues and hospitals as large numbers of people, many of them elderly and alone, died or were taken ill from heat-related causes.
Doctors have cited heat stroke and dehydration as frequent causes of death.
https://en.wikipedia.org/wiki/2003_European_heat_wave
The 2003 European heat wave led to what was, at the time, the hottest summer on record in Europe since at least 1540. France was hit especially hard. The heat wave led to health crises in several countries and combined with drought to create a crop shortfall in parts of Southern Europe. Peer-reviewed analysis places the European death toll at more than 70,000. The UN Office for Disaster Risk Reduction estimated 72,000 deaths related to the event.