UN warns climate change amplifies waterborne disease and refugee displacement worldwide

A new scientific review published in Nature Reviews Microbiology finds that climate change alters the risk landscape for waterborne illnesses. Rising temperatures and more extreme weather events help some bacteria proliferate, while the response of viruses and parasites varies. Floods, heavy rain and droughts can spread pathogens into drinking water, threatening progress that has reduced diarrheal deaths, which still claim about 1.2 million lives each year.

Separate UN analysis highlights that climate‑driven displacement is becoming a permanent condition for large populations. At the end of 2025, 117.8 million people were forcibly displaced, with the burden falling on low‑ and middle‑income host nations that contributed least to the underlying emissions. The report stresses that mitigation and adaptation policies must address both health and humanitarian impacts of a warming planet.