El Nino health risks: The UN has warned that the current El Nino could pose a significant global health threat, with the climate phenomenon forecast to be among the strongest on record. Rising temperatures, extreme drought and heavy rainfall could increase the risk of cholera and mosquito-borne diseases such as malaria, dengue and chikungunya, while placing additional pressure on vulnerable health systems. The WMO has warned that El Nino-related climate impacts could continue into 2027, with scientists highlighting the added risks from already record-high global temperatures.