Introduction

Category 5 hurricane Otis, which devastated Acapulco, was supercharged by global warming; hurricane expert Kerry Emanual tells Science in Action.

Also, Brazilian ecologist Erika Berenguer has witnessed the destruction caused by the prolonged drought in Amazonia, where the rivers are drying up and the forest is burning.

And, climate scientists now say there is less time than previously thought to avoid further dangerous warming. Two climate scientists, Chris Smith and Norman Loeb, break the bad news - that the climate is more sensitive to greenhouse gases than forecasts have used.

Presenter: Roland Pease Producer: Ella Hubber Editor: Martin Smith Production co-ordinator: Jana Bennett-Holesworth

(Photo: A woman sits amongst the damage after Hurricane Otis. Credit: Silvana Flores/Getty Images)