Agatha, the first Tropical Storm of the season, was downgraded to a tropical depression
early on Sunday, leaving a trail of destruction in its wake.
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In Guatemala, authorities said at least 40 people had died in flash floods and mudslides.
Earlier, President Alvaro Colom said 74,500 people were forced from their homes by threat of further cave-ins and flooding.
Four children killed when their house was swept away in a landslide are among the dead.
State of Emergency
The damage caused by heavy rains and high winds prompted the government in El Salvador to declare a state of emergency.
Civil defence chief Jorge Melendez said six people have been confirmed killed in weather-related accidents in El Salvador, and two others are missing.
Colombia and the United States have offered to send aircraft to ferry aid or help with evacuations of storm-hit areas, and six US military aircraft are on their way from Honduras.
But Guatemala City's La Aurora International Airport has been closed since Friday after being showered by volcanic ash from the eruption two days earlier of the Pacaya volcano.
