SAN SALVADOR, El Salvador — At least 13 people have lost their lives in rains that inundated parts of El Salvador, Honduras and Nicaragua over the weekend.

Disaster agencies in all three countries reported deaths as roofs collapsed and residents were carried away by swollen rivers. Six people died in Honduras, four in Nicaragua and three in El Salvador. Authorities were also searching for a boy swept away by a river in Guatemala.

Most of the rain was blamed on a low-pressure system off the Pacific coast of El Salvador. Hurricane Michael in the Caribbean could have also contributed. The storms began Friday and were expected to dissipate Monday.

Residents in affected areas fled to government shelters and awaited help in more isolated areas. Rain also triggered landslides that blocked some highways in the region.