Whilst think that the use of the word 'extreme' to justify the heat is sensationalist I do think the warning is justified. The Southwest and Wales don't have these sorts of temperatures often and people are genuinely not used to them.
Take Cardiff for instance the all time high there is 34c. This Thursday the Met office forecast is for 32/33c.
It's also forecast to get up to 30c in coastal locations widely across Wales and the South West which is really quite unusual.
It's the equivalent of the South East hitting 36/37c which would, sadly, cause many additional deaths and issues as will this heat down here.
Currently living at roughly 65m asl North of Cowbridge in the Vale of Glamorgan.
Formerly of, Birdlip, highest village in the Cotswolds and snow heaven in winter; Hawkinge in Kent - roof of the South downs and Isles of Scilly, paradise in the UK.