A few years ago, the IPCC report said this :
9.4.1. Heat Waves
Global climate change is likely to be accompanied by an increase in the frequency and intensity of heat waves, as well as warmer summers and milder winters
9.4.2. Decreased Mortality Resulting from Milder Winters
22.214.171.124.2. Mild winters (Europe)
That didn’t work out too well, so they have changed their tune.
h/t to Marc Morano