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The Guardian - AU
The Guardian - AU
National
Bianca Nogrady

What happens to your body during extreme heat?

Ollie Jay Australia
Sun rising over Sydney
Extreme heat during hot weather is the most deadly of natural hazards, but even the figures we have of deaths attributed to heat are likely an underestimate. Photograph: Mike Bowers/The Guardian

Last year was the hottest year in recorded history. Global average temperatures over 2023 nudged towards 1.5C above pre-industrial levels, and for two days in November, they reached 2C above those levels.

With a hotter planet come more intense – and therefore more deadly – heatwaves.

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