Climate hazards are increasingly contributing to a growing number of adverse health outcomes  in multiple geographical areas . The net impacts are largely negative at all scales , and there are very few examples of beneficial outcomes from climate change at any scale . While malaria incidence has declined globally due to non- climatic socioeconomic factors and health system responses, a shift to higher altitudes has been observed as the climate warms . Climate variability and change  and population mobility are significantly and positively associated with observed increases in dengue globally; chikungunya virus in Asia, Latin America, North America and Europe ; Lyme disease vector Ixodes scapularis in North America ; and Lyme disease and tick-borne encephalitis vector Ixodes ricinus in Europe . Higher temperatures , heavy rainfall events  and flooding  are associated with an increase of diarrhoeal diseases in affected regions, including cholera , other gastrointestinal infections  and food-borne diseases due to Salmonella and Campylobacter . Floods have led to increases in vector- and waterborne diseases and to disturbances of public health services . Climate extremes increase the risks of several types of respiratory tract infections . Climate-related extreme events such as wildfires, storms and floods are followed by increased rates of mental illness in exposed populations  .
IPCC
Climate Change 2022: Impacts, Adaptation and Vulnerability
IPCC Report