Three days of heavy rains in El Salvador have touched off floods and slides, killing at least 91 people.

Authorities had to use helicopters to reach some of the most severely affected townships because of damage to roads.

The capital, San Salvador, and central San Vicente province were the hardest-hit regions.

Authorities, said 60 people are still missing and about 7,000 are in shelters. Most of the victims were buried by slides or carried away by raging rivers.

The U.S. National Hurricane Centre said Hurricane Ida's presence in the western Caribbean may have played a role in drawing a Pacific low-pressure system toward El Salvador, causing the rains.