Tropical nights: A growing risk as global temperatures rise

The biggest rise in extreme temperatures is not in the daytime. Heat stress at night has damaging knock-on effects on health and safety.

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Customers at a coffeeshop in Nice as the French city swelters in a heatwave the remains unrelenting even as the sun sets.

Customers at a coffee shop in Nice as the French city swelters in a heatwave that remains unrelenting even as the sun sets.

PHOTO: AFP

Attracta Mooney, Nassos Stylianou and Jana Tauschinski

As Lorna Powell, a National Health Service (NHS) urgent care doctor in London, watched a weather forecast for extreme heat across Britain in June, one prediction in particular caught her attention.

Meteorologists warned that the British capital could experience a slew of so-called tropical nights, in which temperatures remain above 20 deg C. The prediction came true: In June, London endured a record-equalling five consecutive such nights. For Powell, that meant more patients.

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