The famous Iguazu Falls on the Argentina-Brazil border have registered 10 times their usual volume of water after heavy rains, authorities said, closing one of the site’s main tourist trails for safety reasons.

Flow through the massive waterfall system reached 14.5 million liters (3.8 million gallons) per second Wednesday night, well above the usual 1.5 million per second, said Wemerson Augusto, spokesman for Iguazu National Park.

The high water level prompted officials to close the Devil’s Throat walkway, famous for its stunning views of the falls, after it became partially submerged, Augusto told AFP.

He said such a large water rush was “atypical” for October.

Sidewalks on the Argentine side were also closed on Tuesday.

The falls were swollen by torrential rains in southern Brazil’s Parana state, where emergency officials said on Wednesday 24 counties were hit by “severe weather events,” damaging about 400 homes and forcing more than 1,200 people from their homes.

The volume of water was the highest recorded at the falls since June 2014, when flow reached 47 million liters per second.