The storm was centered about 20 miles (30 kilometers) west-southwest of San Andres and 125 miles (200 kilometers) east-northeast of Bluefields, Nicaragua. It was moving west at 17 mph (28 kph).
Colombian President Gustavo Petro had declared a “maximum alert” on San Andres as well as Providencia islands to the north and asked hotels to prepare space to shelter the vulnerable population. Officials on San Andres imposed a curfew for residents at 6 a.m. Saturday to limit people in the streets. Air operations to the islands were suspended.
Similar precautions were underway in the central area of Nicaragua’s Caribbean coast, where authorities issued an alert for all types of vessels to seek safe harbor. The hurricane was on a general path to the area of Bluefields and Pearl City.
Nicaraguan soldiers deployed to help evacuate inhabitants of islands and cays around the town of Sandy Bay Sirpi. The army said it delivered humanitarian supplies to Bluefields and Laguna de Perlas for distribution to 118 temporary shelters.
Forecasters said a greater threat than Julia’s winds were rains of 5 to 10 inches (13 to 25 centimeters) — up to 15 inches (38 centimeters) in isolated areas — that the storm was expected to dump across Central America.
“This rainfall may cause life-threatening flash floods and mudslides through this weekend,” the U.S. National Hurricane Center said.
The storm’s remnants were forecast to sweep across Nicaragua and then skirt by the Pacific coasts of El Salvador and Guatemala, a region already saturated by weeks of heavy rains.
In Guatemala, officials said Julia could drench 10 departments in the east, center and west of the country — an area that has been most affected by this rainy season and where the poorest people are concentrated.
From May to September, storms have caused 49 confirmed deaths and six people are missing. Roads and hundreds of homes have been damaged, Guatemalan officials say.
In El Salvador, where 19 people have died this rainy season, the worst rainfall is expected Monday and Tuesday, said Fernando López, the minister of environmenta and natural resources. Officials said they had opened 61 shelters with the capacity to house more than 3,000 people.