SKOPJE, Macedonia (AP) — Two dams in Macedonia are in danger of collapsing because of extensive flooding caused by four days of torrential rain, while authorities were airlifting supplies Wednesday to hundreds of people stranded by floodwaters.

About 1,500 people have been stranded in the village of Zleovo since Tuesday, when a swollen river swept away two bridges.

Police were airlifting supplies of food, drinking water and a medical team to the village by helicopter until the army and local workers can restore access to the village, government spokesman Aleksandar Gjorgjiev said. Machinery was expected to take about two days to build a new road to Zleovo, Gjorgjiev said.

Authorities were also using trucks to supply drinking water to the 40,000 residents of the central town of Stip, after floodwater contaminated the town's wells.

In the eastern part of the country, the situation at the Pisica dam was considered critical because of a 20-meter (65-foot) crack, which is currently above the water line, the National Crisis Management Center said.

Authorities evacuated about 140 people from 40 houses in the village of Pisica, as well as 800 cattle, because of the precarious situation of the dam, the center's spokeswoman, Nadica V'ckova, said.

A swollen river in western Macedonia was also threatening another dam, the Slatino, near Lake Ohrid. That dam has long been problematic, with leaks reported since 2011, and the recent heavy rainfall had further weakened the structure, authorities said.

Ten people who live in the sparsely populated area have been evacuated. A collapse of the barrier would flood about 500 hectares (1,235 acres) of land and lead to the loss of fish in an artificial lake near Ohrid, the crisis management center said.

V'ckova said a total of about 1,000 people had been evacuated because of the floods in eastern and northeastern parts of the country.

Rescue crews were distributing food, clothing, blankets and medicine to those affected. The national electricity company managed to reconnect the power supply for 20,000 people in the central town of Sveti Nikole who had been without electricity since Tuesday morning.

Although the weather was starting to improve and rain had stopped in some areas, the river levels were still dangerously high. Meteorologists have said the rain would continue in parts of the country until Thursday.