So how do heatwaves or extreme heat events affect human health and the health system?

Um, well, in many ways actually, and the-- and starting from rather crude ways and, and s-in the sense of mortality increasing when it gets hotter.

So even at twenty-four degrees in London, the death rate starts to go up.

And twenty-four degrees, most of us think of as quite nice.

But it goes up exponentially.

So thirty-five degrees, th-we're expecting a, a significant number of more deaths, and we've seen that recently in data in Europe, uh, in heatwave.

So that's a kind of crude black and white bit.

[laughs]