The resulting changes in the global climate bring a range of risks to health, from deaths in extreme high temperatures to changing patterns of infectious diseases. Climate and weather variables pose threats to food and water security, and cause outbreaks of waterborne and vectorborne diseases. Moreover, the increased pressure on scarce resources triggers climate-related migration and conflicts. Under business-as-usual scenarios, it is estimated that between 2030 to 2050, climate change will cause an additional 250 000 deaths annually.