CAGUAS, Puerto Rico (AP) — Hurricane Fiona left hundreds of people stranded across Puerto Rico after smashing roads and bridges, with authorities still struggling to reach them four days after the storm smacked the U.S. territory, causing historic flooding. Government officials have been working with religious groups, nonprofits and others braving landslides, thick mud and broken asphalt by foot to provide food, water and medicine for people in need, but they are under pressure to clear a path so vehicles can enter isolated areas soon. Nino Correa, commissioner for Puerto Rico’s emergency management agency, estimated that at least six municipalities across the island had areas that were cut off by Fiona, which struck as a Category 1 hurricane and was up to Category 4 power Thursday as it headed toward Bermuda. Manuel Veguilla said he has been unable to leave his neighborhood in the north mountain town of Caguas since Fiona swept in on Sunday. “We are all isolated,” he said, adding that he worries about elderly neighbors, including his older brother who does not have the strength for the long walk it takes to reach the closest community. Veguilla heard that municipal officials might open a pathway Thursday, but he doubted that would happen because large rocks covered a nearby bridge and the 10-foot space beneath it. Neighbors have shared food and water dropped off by nonprofit groups, and the son of an elderly woman was able to bring back basic supplies by foot Wednesday, he said.