How dangerous is extreme heat to humans?

The media reporting around heat waves that have hammered the northern hemisphere has been unequivocal: the simultaneous record-breaking heat has "pushed the limits of human survival."

July was the planet's hottest month on record—so far

A sizzling month marked by record heat waves, major wildfires, melting sea ice and a burgeoning El Niño will go down in the books as the hottest July on record—at least until next year, federal officials said Monday.

N. Atlantic ocean temperature sets record high: US agency

On the heels of a new record high in the Mediterranean, the North Atlantic reached its hottest-ever level this week, several weeks earlier than its usual annual peak, according to preliminary data released Friday by the US ...

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