[asdfasgasdgasdg]

Ultimately, anywhere that is relatively wet and/or not located in a forest is probably decently safe from forest fires. In terms of safety from heat waves, there are a few good hedges: a very well insulated house, ideally with some sort of reflective roof. A backup battery system that allows you to run independently in the case of a grid failure. Solar panels that work when the grid is off, which have excess capacity. Redundant cooling systems? If you really wanna go crazy, build a small underground bunker like Colin Furze did.

With these things in place I think you'll be safe enough during any foreseeable heat waves. You still wouldn't be able to go outside on really hot days, but you wouldn't likely die due to overheating.

[fy20]

I think it's worth remembering that climate change isn't just heat waves. The same will also protect you well from cold spells, but you should build a home that fairs well with other extreme weather too.

It didn't get much publicity, but last weekend there was an F4 tornado that destroyed a number of villages in the Czech Republic:

https://www.bbc.com/news/world-europe-57605651

[asdfasgasdgasdg]

Tornados are pretty scary but ultimately the likelihood of ever being struck by one directly is not very high. That said, a reinforced cellar could hardly to amiss if planning for extremities. And building on high ground should go without saying. Wouldn't do to have your fortress of solitude flooded out by a heavy rain storm. Not too high though: mud slides.