Here in the UK we have just had a short spell of extreme heat.
We have had the hottest ever recorded day in July, and may have surpassed the hottest ever day in the UK.

The main consequences were transport disruption with many reports of people confined in overcrowded trains without air conditioning.

The heatwave was followed by thunderstorms and flooding, most unfortunate for those affected, but not very widespread.

I was certainly glad of a portable air conditioner, used reluctantly due to the electricity consumption and noise. Permanently installed air conditioning is not common in the UK.