"Catastrophic" Floods Engulf Houston

Tropical Storm Harvey has caused the worst floods in the city of Houston since records began, but is the situation comparable to Hurricane Katrina? We hear from a survivor of that storm, who currently lives in Houston.

Also on the programme: Can the FARC guerrilla movement of Columbia successfully transform into a legitimate political party? And the Notting Hill Carnival, the biggest street party in Europe is underway, less than a mile from the Grenfell tower block, where at least eighty people lost their lives in a fire.

(Picture Residents are rescued from the River Oaks neighbourhood of Houston Credit Scott Olson/Getty Images)