human Health

Researchers have found that there is a close link between local climate and the occurrence or severity of some diseases and other threats to human health. It is estimated that climate change contributes to 150,000 deaths and 5 million illnesses each year, and the World Health Organization estimates that a quarter of the world's disease burden is due to the contamination of air, water, soil and food.

The biggest tolls were in Africa, on the Indian subcontinent, and in Southeast Asia. Most of the increased burden of death and disease were from malnutrition, diarrhea, malaria, heat waves, and floods. But those diseases will play a minor role, at best, in many regions that nevertheless will feel the effects of global warming.
Some of climate change’s impacts on health include: Increased frequencies of heat waves; more variable precipitation patterns compromising the supply of freshwater, higher  risks of water-borne diseases; and a rise in coastal flooding due to rising sea levels, etc.

Some of the health effects may lie ahead if the increase in very extreme weather events continues. Abrupt change of temperatures leading to heat waves or cold spells have become widespread, causing indirectly fatal illnesses, such as heat stress or hypothermia, as well as increasing death rates from heart and respiratory diseases. Statistics on mortality and hospital admissions show that death rates increase during extremely hot days, particularly among very old and very young people living in cities.

reference