In North America, stormwater and water treatment infrastructure play important roles in reducing water-borne disease risk during precipitation events . In the USA, heavy precipitation events are associated with higher rates of childhood gastrointestinal illness in municipalities with untreated drinking water, but not in municipalities with treated drinking water . In Mexico, disparities in access to treated water are a key determinant of morbidity in children under age 5 years . In remote communities in Alaska and Northern Canada, challenges in water service provision and maintenance can increase risk of water-borne disease during high- impact weather events . In older sections of many North American cities, sewage treatment plant capacity is exceeded by overflow of combined sanitary and storm sewer systems during heavy precipitation events, resulting in bypass of untreated and microbiologically contaminated wastewater discharge into drinking water sources . These sewer overflow events are associated with increased gastrointestinal illness across age groups .
IPCC
Climate Change 2022: Impacts, Adaptation and Vulnerability
IPCC Report