I wouldn't take that as scaremongering, I see no reason to interpret it that way, but I wouldn't necessarily take any precautions either. I'm not elderly or extra vulnerable, and I don't spend much time out of the air-conditioned house anyway. My parents are elderly, I guess, so I might warn them not to go out if I think they didn't happen to hear the announcement.

I’d definitely not go on a hike.

Given the precautions are common sense (windows open, blinds down, lots of water, sun cream and don't overexert yourself - especially when the sun is at its highest) - I am have no issue exercising common sense.

It depends on how it was phrased. Is the above a direct quote?

Pure scaremongering, but I wouldn't go running outside at 36 degrees at noon. Alerts of severe rain, in the other hand... will make me prepare for the "worst".

Yeah if I cared about living I would definitely take precautions - we just had an ex-NFL player, 38, drop dead from heatstroke in his apartment last month, he kept his apartment hot to work out in, but that's what happens when you don't take that shit seriously