I can't imagine this is significant unless there is a demonstrated reporting bias between the US and Europe. Otherwise I'd assume it's a wash
There is. In Texas, if a field worker has a heart attack on a hot day it’ll be reported as a heart attack.
In France, the same exact situation would be reported as a heat casualty leading to heart attack.
There was a good More Or Less (uk radio programme) episode about this last week. Essentially, the European statistics on this tend to be based on excess mortality during hot periods, while US stats currently are much more about what words are used on death certificates. Very different measures and hard to compare.