Source: https://www.niehs.nih.gov/research/programs/climatechange/health_impacts

Climate change impacts human health in both direct and indirect ways. Extreme heat waves, rising sea level, changes in precipitation resulting in flooding and droughts, and intense hurricanes can directly cause injury, illness, and even death. The effects of climate change can also indirectly affect health through alterations to the environment. For example, worsening air pollution levels can have negative impacts on respiratory and cardiovascular conditions. Changes in temperature and rainfall can alter the survival, distribution, and behavior of insects and other species that can lead to changes in infectious diseases. Increases in precipitation, storm surge, and sea temperature can lead to more water-related illnesses. Climate change can also affect food safety, exposing people to contaminated foods that can result in foodborne illnesses. In addition, climate change can affect mental health and well-being.