Maybe? I am talking about today. The only number of heat deaths I see on this site is average in the US and its like 100-something, likely more related to the aging of the population than anything else.

To be honest I skimmed this article a few times rather that read it but I don't see anything that points to heat being anything close to the magnitude killer that cold is today. (although apparently in the US heat is a bigger deal probably because we are well equipped to handle both and don't have old people taking walks in freezing weather but they venture out in the summer)