El Niño is here, so what does it mean?

Forecaster reservoir feeding the Guavio Hydroelectric Power Plant in Gachalá, in Colombia's Guavio Province, during dry conditions linked to El Niño.'/>

An El Niño has formed amid the warmer-than-normal waters in the tropical Pacific. Now it's a question of how intense the phenomenon will be, and where effects like heat and drought will strike.

(Image credit: Jhojan Hilarion)