Great lakes, Maine, Northern Europe, Japan, Southern Chile, New Zealand?
Of course, what BC is experiencing right now demonstrates that it may be more complicated or impossible to predict.
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.
It didn't get much publicity, but last weekend there was an F4 tornado that destroyed a number of villages in the Czech Republic:
Michigan in general is solid because of the great lakes.
There's been lots of people in the past suggesting that Canada would be a good place to be in as the planet warmed. NOPE!
(Muskeg also covers Siberia.)