I'm in St Ives, slap bang in the middle of the hot zone.
Contingency plan is book into an air conditioned hotel for two or three days.
I was in NW Germany back in 2019 when they broke their temperature records. 41c was too much for me then, heat is the number one trigger for my cluster headaches.
Suffering with them now and trust me they ain't no joke when you exceed the safe limit for Sumatriptan injections in a 24hr period