Donal MacIntyre follows heat's journey from the jungles of the equator to the snows of the arctic. In the steaming jungles of Belize the British Army show him what life is like in the world's biggest sauna. In the blinding heart of the Sahara desert he runs the infamous Marathon of the Sands. Fooled by mirages and blasted by sandstorms, he witnesses the very worst that desert weather can throw at him. He gets as close to lightning as he dares and meets a woman who has been struck three times, before finding out that a warming world may mean yet wilder weather for us all. Show less