Logistically (from wikipedia): Elderly people living by themselves had never faced such extreme heat before and did not know how to react or were too mentally or physically impaired by the heat to make the necessary adaptations themselves. Elderly people with family support or those residing in nursing homes were more likely to have others who could make the adjustments for them. This led to unexpected survival rates with the weakest group having fewer deaths than the more physically fit; most of the heat victims came from the group of elderly not requiring constant medical care; often childless women who lived alone.
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The 2003 European heat wave killed an estimated 70,000 people: https://en.wikipedia.org/wiki/2003_European_heatwave
Logistically (from wikipedia): Elderly people living by themselves had never faced such extreme heat before and did not know how to react or were too mentally or physically impaired by the heat to make the necessary adaptations themselves. Elderly people with family support or those residing in nursing homes were more likely to have others who could make the adjustments for them. This led to unexpected survival rates with the weakest group having fewer deaths than the more physically fit; most of the heat victims came from the group of elderly not requiring constant medical care; often childless women who lived alone.
Academic source: https://comptes-rendus.academie-sciences.fr/biologies/articl...