Eight Australians are believed to be trapped in South America after severe landslides hit Argentina.

The Australian climbers were reported to have been at the Puente del Inca, a naturally-formed arching bridge over a river about 1400 kilometres west of Buenos Aires when the first of the landslides hit on Thursday.

"We are aware of media reports that eight Australians have reportedly been affected by the landslides in the Puente del Inca region of Argentina", a spokesperson from the Department of Foreign Affairs and Trade said.

"The Australian Embassy in Buenos Aires is contacting local authorities to determine their whereabouts and check on their welfare."

Hundreds of people have been left stranded after heavy rain caused several landslides and rockfalls across the Mendoza province. Hundreds more have been evacuated.

Tonnes of mud and rock have blocked paths and roads in and out of Puente del Inca and the surrounding area, in what clean-up boss Miguel Manuel Rivas described as "a catastrophe, a tsunami of mud and stone".

The Los Andes newspaper in Argentina reported that the Australian climbers tried to get around path controls in the area to try to reach the base of Mount Aconcagua, the highest mountain in the Americas. It is part of the Andes mountain range, which borders Peru and Argentina.

The newspaper reported that park rangers saw the Australians try to avoid the park controls and stopped them from continuing on their journey.