Costa Rica's government said that seven shelters in the northern part of the country already held nearly 700 people displaced by flooding.
A massive landslide a week ago cut the main highway linking the capital San Jose to the Caribbean coast and it remained closed Friday. The government canceled classes nationwide Friday.
Heavy rains had also destroyed or damaged a number of bridges.
A tropical storm warning was in effect for Colombia's San Andres Island and from Cabo Blanco in Costa Rica northward to Puerto Sandino in Nicaragua.