Landslides have killed at least 112 people in south-west Colombia and left many more injured, says President Juan Manuel Santos.
Hours of heavy rains overnight caused rivers to burst their banks, flooding homes with mud in Putumayo province.
An unknown number of people are missing. One army officer said the main local hospital was struggling to cope.
Mr Santos, who has travelled to the area, said troops had been deployed as part of a national emergency response.
The region’s governor, Sorrel Aroca, told Colombian media that whole neighbourhoods had been buried.