The Caribbean, the Pacific coast and the northern zone were suffering the onslaught of a low pressure system that caused widespread flooding.
Hundreds again were evicted from their homes, and many were in public shelters.
A group of tourists who were rafting were said to be trapped by rising water near Siquirres on the Río Pacuare. The Cruz Roja was trying to help them.
Men with heavy machinery made a daring rescue of a family of four that was stranded in a clump of trees in the flooded soccer field in Javillos.
A giant backhoe braved the rapidly flowing four-foot water to effect a rescue. The family was at home when a wall of water carried away their home and crushed it.
Ruta 32, the highway from San José to Limón was closed again by a landslide at Kilometer 22, just north of the capital. There was another slide further north, but police managed to keep one lane open.
Other highways were closed by slides. Some bridges were swept away, and other roadways were damaged. An inventory is expected to be made this morning.
The Río Sixaola was reported causing flooding in southeastern Costa Rica. Many of the other rivers
that empty into the Caribbean were reported to be at flood stage.
The national emergency commission issued alerts for Acosta, León Cortés, Tarrazú, Dota and Escazú, all in the province of San José and the cantons of Parrita, Aguirre, Golfito and Corredores in the province of Puntarenas.
There also were alerts for the entire Caribbean and the north Pacific coasts.
In some places in the northern zone the rain began at 9 a.m. Monday had continued through nightfall Wednesday. Many communities were under three feet of water.
However, the Instituto Meteorológico Nacional issues a favorable weather report for Sunday, which is election day for municipal offices in Costa Rica. But it predicted afternoon downpours for most of the country today.
The Cruz Roja said it helped open shelters in La Fortuna, Muelle de San Carlos, Matina, Cariari and La Vega de la Fortuna. The emergency commission opened shelters elsewhere, too.
The emergency commission alerts were mainly for communities that were in danger from possible slides or had experienced them during the heavy rains of the first days of November. In San Antonio de Escazú 23 persons lost their lives when a mountainside buried their homes. There still are threatening hills in Ciudad Colón and Aserrí.