Some of Rio’s most iconic neighbourhoods, including tourist hot spots like Ipanema and Copacabana, were battered by winds of up to 110 kilometres per hour (68 mph) on Wednesday night, with precarious hillside favelas hit by mudslides that closed roads.

At least six people died, with two of them killed when a bus was buried by a mudslide while driving along an exposed coastal road, authorities said.

“It was a lot of water that ended up causing this tragedy.

“It was unexpected,” Rio’s mayor, Marcelo Crivella, told local news media.

The storm came just days after Rio experienced its hottest January in 97 years, with temperatures rising as high as 42 degrees Celsius (107.6 degrees Fahrenheit).

On Thursday, doormen swept up branches outside upscale apartment buildings, while street cleaners fanned out across the city, trying to bring order to the post-apocalyptic scenes.

In Arpoador, on Ipanema’s world-famous beach, a small sailboat was washed up on shore.

The couple inside managed to escape when it was swept ashore, local media reported.

During Wednesday night, many people had been stranded in restaurants and bars when the storm hit, watching with fear and incredulity as winds tore through the streets, flattening signs and blasting parasols.

TV images showed one man being swept away by a raging torrent of water that gushed through the Rocinha favela, while other reports displayed cars succumbing to the flow.

Crivella noted that Rio was not yet out of danger, with more rains due later on Thursday.

“They will be less intense rains, with less powerful winds.

“We ask that people stay in a safe location,” he said.