The people who are dying are obviously not healthy 20/30-something males (which I presume you are), but rather the very old and the very young (and most likely quite sick in the first place too!)... Europe wasn't prepared for this. And as someone else said, people die from heat in places that are usually warm too, such as Texas.
Also, I'm sure that if today, Arizona suddenly got the weather of, say, northern Finland during winter time, a few people would die as well. I'm sure you see the silliness in the Finns then saying "but -40 degrees Celsius isn't that cold, why are they dying? Are they so dumb they don't know how to survive in the Arctic circle?" 😉.
Also, I'm sure that if today, Arizona suddenly got the weather of, say, northern Finland during winter time, a few people would die as well. I'm sure you see the silliness in the Finns then saying "but -40 degrees Celsius isn't that cold, why are they dying? Are they so dumb they don't know how to survive in the Arctic circle?" 😉.