Landslides have killed at least 92 people in south-west Colombia, the Red Cross said on Saturday.
More than two hundred people have been reported injured, and an unknown number are missing.
Hours of heavy rains overnight caused rivers to burst their banks, flooding homes with mud in Putumayo province.
President Juan Manuel Santos, who is travelling to the area, said troops had been deployed as part of a national emergency response.Image copyright Getty Images / Colombian Army Image caption The landslide destroyed homes and buried cars
The region's governor Sorrel Aroca told Colombian media that whole neighbourhoods had been buried.
Jose Antonio Sanchez, mayor of the provincial capital Mocoa, told Caracol radio that the town was "totally isolated", without electricity and water.Image copyright Getty Images / Colombian Army Image caption The mudslides were caused by the rise of the Mocoa River and various tributaries
March was the country's rainiest month since 2011, according to the state meteorological agency.
Putumayo borders Ecuador and Peru.
Across Peru more than 90 people have died since the start of the year because of unusually heavy rainfall, which also caused landslides and flash floods.