But they also include developing countries like Afghanistan, Guatemala, Honduras and Papua New Guinea, that are more likely to lack resources to keep people safe.
Other areas at particular risk include far eastern Russia, northwestern Argentina and part of northeastern Australia.
The study was published Tuesday in the journal Nature Communications.
So they might not be as prepared.
According to the study, these include economically developed places like Germany, the Netherlands, Belgium and Luxembourg, plus the region of China around Beijing.
These places, the study argues, are now prepared to some degree for future severe hot spells.
But there are still many areas that, simply by chance, havent yet experienced such extreme heat.
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