The Spanish Prime Minister Pedro Sanchez has deployed 10,000 extra troops to the area of Valencia, where record-breaking floods have killed 211 people. It is the country's largest peacetime deployment of troops. We take a look at how environmental factors might have contributed to the disaster.

Also in the programme: a strike has injured a number of people at a polio vaccine clinic in Gaza City; and was the COP16 successful in setting out measures to protect biodiversity?

(Photo: army troops arrive in Utiel town, province of Valencia, eastern Spain. Credit: Alvaro Del Olmo / Shutterstock)