Europe sees more than 1,300 excess deaths amid brutal heatwave, WHO says

[VCheng]

London is a blast furnace.....
The heat is absorbed by the concrete during the day, and then radiates out at night, keep the temperature very high at night. Now add the humidity, so sweating can't help much and the masses of insulation in our homes, you literally cook.
We also have a huge population and lots of buildings together.

All those factors apply pretty much the same across the globe for large metropolitan areas. The correct solution - airconditioning - is often made impassible by local regulations, taxes and energy costs, cloaked in various garbs.

 

[AZ_HighCountry]

London is a blast furnace.....
The heat is absorbed by the concrete during the day, and then radiates out at night, keep the temperature very high at night. Now add the humidity, so sweating can't help much and the masses of insulation in our homes, you literally cook.
We also have a huge population and lots of buildings together.

Consider it training for your trip to the desert.

On a serious note, the City of Phoenix came to the realization a few years back that if they'd plant more native trees, it just might help with the heat.