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Megacity heatwaves are now a fatal nightmare

Daytime and night-time heatwaves are coinciding, leaving no opportunity to cool down.

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The sprint of one sweltering afternoon is survivable for most people, but the marathon of days on end with no night-time respite can be fatal, says the writer.

The sprint of one sweltering afternoon is survivable for most people, but the marathon of days on end with no night-time respite can be fatal, says the writer.

PHOTO: AFP

David Fickling

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Most people in reasonable health could probably complete a 100m run without serious ill effects. Get them to jog non-stop for 24 hours, and they might be in serious danger.

That’s a useful way to think about how urbanisation on our rapidly warming planet is risking the well-being of billions of people.

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