Volunteers delivered food and solar-powered radios to the community of Rio Abajo, Utuado, Puerto Rico, on October 22.

A bridge destroyed by Hurricane Maria left Rio Abajo cut off from the rest of Puerto Rico. Without road access to the town, aid can only be delivered by helicopter or via a pulley system, as seen in this footage.

The only way out for residents to leave the town is to climb down a ladder on the side of the bridge and cross the river, according to a blog post written by Ryan Robertson, who traveled with our source through Puerto Rico delivering aid.

The mountainous community, made up of at least 27 families, does not have access to electricity or a water supply. There are concerns for residents who require medical support, like 46-year-old Lilia Rivera, who suffers from respiratory issues and requires electric therapy devices to help her breathe. She is currently running the devices on battery power but told Univision she has had already experienced several battery failures. Credit: Twitter/Antonio Paris via Storyful