Some animals, including most of the park’s elephants, have managed to flee the flooding to areas near where park officials say they can provide them protection from poachers, but the rhinos have escaped to areas difficult for the rangers to patrol, said Satyendra Singh, the park’s director.

Most of the park’s ranger stations have flooded. The authorities have turned to technology to patrol the 195-square-mile park, relying on drones to monitor the rhinos and look for poachers. The drones, Mr. Singh said, are able to follow the animals even when they leave the park.

“They are going for the shelter,” Mr. Singh told The Associated Press. “So we have to give protection to those animals, and so whenever some animals are going outside the park, we are sending our team along with them.”

Rangers were also posted along the highway near the park, searching vehicles for poachers and providing security to animals trying to cross the road.