I said nothing about "hype messaging" I said responding agencies in the UK had a duty to Warn, inform and advise the public.
You're conflating two distinct things again, not sure if you're doing it deliberately or not, but warning, informing and advising about Heatwave "stay cool, stay hydrated and cover up" (which is the generic public messaging) is not the same thing as people talking about the long term effects of climate change and using a 40 degree threshold being hit as evidence of that. 
The point you followed up about infrastructure...what do you think the effect on a local health economy is in the UK if a server overheats and fails is?
 Or an additional 10% increase in patients through UEC pathways across that health economy? 
How well prepared are UK hospitals for 38 degree + temperatures - maternity services, burns units, old buildings (around 30% of the UK hospital infrastructure is around 60 years old), medicines storage facilities, mortuary cooling, power infrastructure?