LIMA, Peru — Helicopters are struggling to bring out Machu Picchu tourists stranded by mudslides, yet new arrivals are swelling the numbers of those hunkered down in villages near the Inca citadel, complaining of a lack of food, water and accommodations.

Conditions are deteriorating for the 1,500 travelers still stranded four days after slides cut a railway that is the only route to and from the hard-to-reach area atop an Andean mountain ridge. Officials had talked of having the rail route restored and the tourists out by Tuesday, but authorities now say they likely will need two or three more days.

Helicopter rescue efforts have been hampered by rain. And the numbers needing help have been swollen by the steady arrival of more tourists to the evacuation area as people complete treks on the Inca trail that ends at Machu Picchu, the 15th-century Inca fortress 8,000-feet high in the Andes.

Choppers flew out more than 1,000 tourists Tuesday and Wednesday, but there were 250 new arrivals Wednesday and more were expected today. Authorities closed the Inca trail Tuesday after a mudslide killed two people, so many people who started the four-day trek before that will be arriving at Machu Picchu in the coming days.

“It’s worrisome. We didn’t think it would take this long,” Tourism Minister Martin Perez told RPP radio Wednesday. “We can evacuate 120 tourists per hour; now the only thing we need is for the climate to help us out a little bit.”

Downpours let up Wednesday, but meteorologists forecast moderate rain for the rest of the week. Adding to the worries, tourists flown out Wednesday told AP Television News that a rain-swollen river had eroded the site where rescue helicopters are landing.

Stranded travelers, including hundreds from the United States, Argentina and Chile, complained of price-gouging because of scarce food, water and accommodations in Machu Picchu Pueblo, a village of 4,000 people near the citadel.

“It’s chaos. We don’t have food, we don’t have water, we don’t have blankets, we can’t communicate and the police lack an evacuation plan to put us at ease,” Argentine tourist Alicia Casas told Canal N TV station.

Ruben Baldeon, town spokesman in Machu Picchu Pueblo, said bottles of water were selling for $3.50 — five times the typical price — and electricity to the town had been cut.

Foreign Minister Jose Antonio Garcia Belaunde told The Associated Press that 1,500 to 1,600 tourists remained stranded and more were arriving.

“Everyone is safe, though obviously uncomfortable. They are sleeping in tents, and the food gets there late, but what’s important is that they are safe,” he said.

Mudslides from heavy rains have killed a total of five people in the Cuzco region, including an Argentine trekker and her guide who were crushed while camping on the Inca trail Tuesday.

U.S. Embassy spokesman James Fennell told the AP that more than 60 U.S. citizens, including all stranded American children, were evacuated Wednesday.

About 400 Americans, 700 Argentines, 300 Chileans and 215 Brazilians were among the roughly 2,000 travelers initially stranded when train service was halted.

U.S. authorities have sent six helicopters stationed in Peru for drug interdiction and police training to join four Peruvian military and several private choppers in the rescue.