Floods in South America, fires in Indonesia, famine threatened in Ethiopia, yet more drought in Southern Africa and central America. Plus, a stunning peak in global temperatures for 2015. The current El Nino, just past its peak, has a lot to answer for. Roland Pease talks to the experts who forecast, track and analyse the events in the Pacific Ocean associated with this powerful climate phenomenon. And seeks answers to some burning questions.

(Photo: Indonesia forest fire burning, 2015. Credit: Ulet Ifansasti/Getty Images)