Agree with :@WitchWithoutChips
On the news I am seeing guidance for people re keeping hydrated, keeping animals out of the sun, curtains shut, making sure elderly people are checked in on. Plus an acknowledgement that these temps are incredibly unusual for the UK.
On this thread I see advice, tip sharing and advice. Plus a few scoffers and deniers. I mean, whatever rocks your boat, but it is a fact that the temps are warmer than many are used to and many will both need and welcome advice on how to deal with it.
To call it mass hysteria is a bit overbaked. (See what I did there?)