The Bolivian government declared a national disaster Tuesday after severe floods in the country's northeast killed 51.
Some 47,000 families have been hit by the flooding, which threatened the Amazon city of Trinidad.
Defense Minister Walker San Miguel announced the declaration a day after President Evo Morales toured the region hit by flooding, the result of heavy rainfall since November.
Trinidad's population of 300,000 was under imminent danger from flooding, and authorities have begun taking emergency measures to confront the threat.
"In Trinidad 300 tents have been set up and 80 tonnes of food and provisions have been distributed," said Morales spokesman Alex Contreras.
"Moreover rescue teams are working the support of helicopters from Brazil" in the city, he said.
The Civil Defense office said that the flooding has killed a total of 51 people and left four missing.
