By Kristen Rogers, CNN Updated 4:21 PM ET, Tue March 15, 2022 An elderly person (not involved in the research) closes his shutters to keep cool during the heatwave in Clermont-Ferrand, France, on June 25, 2019. (CNN)If you’re not familiar with the term “mild cognitive impairment,” you’re not the only one. More than 80% of Americans...
