Researchers warn the world is unprepared for El Niño health risks

El Niño changes weather around the world and can increase risks from disease, hunger and extreme heat.

Researchers say forecasts give governments time to prepare, but that warning is not being used enough.

They call for better local health plans, stronger cooperation between health and climate experts, and more tracking of impacts.

Knowing what El Niño causes can help direct limited aid where it is most needed.