According to Seth Borenstein, it takes more than 60 years.
Heat Will Kill More Than Cold in Europe Eventually
a new study in Europe finds that around 2040, the increase in heat deaths will likely outweigh the reduction in cold deaths. The study suggests that by 2070, global warming may cause 15,000 more temperature-related deaths a year in Europe, which has less air conditioning than the United States.
Winter temperatures in Europe, the US and Russia have plummeted over the last decade.
Summer temperatures have also gone down in most of those regions.