https://www.cnn.com/2019/01/16/health/climate-change-health-emergency-study/index.html
"The grim analysis comes from one of the authors of a new report in the New England Journal of Medicine that suggests rising global temperatures could lead to many more deaths than the 250,000 a year the World Health Organization predicted just five years ago.
In 2014 the WHO said that climate change will bring with it malaria, diarrhea, heat stress and malnutrition, killing that many more people annually around the world from 2030 to 2050.
In reviewing the research on the topic, study co-author Sir Andrew Haines thinks our health is much more vulnerable to climate change -- and he believes 250,000 deaths is a "conservative estimate."