Residents are being evacuated from Cape Town neighbourhoods as a wildfire spreading on the slopes of the city’s famed Table Mountain was fanned by strong winds overnight and houses came under threat.

City authorities said residents of parts of the Vredehoek suburb were being evacuated as a “precautionary” measure after the blaze spread towards the area.

Devil’s Peak, one of the most famous points of the mountain, was lit up in the early hours of the morning by the flames, which had now spread to the front side of the mountain and towards residential areas.

A man in his 30s has been arrested on suspicion of arson, a city official said, although it is not clear if he was responsible for starting the blaze, which began early on Sunday.

The man was arrested on Sunday night after witnesses reported seeing three people moving through flames on the mountain slopes setting more fires, Cape Town safety and security official JP Smith told the Associated Press.

More than 250 city and volunteer firefighters have been deployed to battle the fire, which has already damaged parts of the University of Cape Town, including the library, a historic windmill, and a restaurant near a memorial for Cecil Rhodes.

Helicopters with water containers suspended on ropes are scooping up water from swimming pools and the nearby ocean and dumping it on the fire.

Wildfires on the mountains surrounding Cape Town are fairly common during the hot, dry summer months but are sometimes fanned into huge, uncontrollable blazes by strong winds.

Gift of the Givers, a disaster response organisation, said it was providing meals for around 4,000 students who were evacuated from the university campus.

Many of those students were taken to local hotels, Gift of the Givers said.

Activities at the university have been shut down until at least Wednesday, the university said.

The charity is also supplying food and water for firefighters who have been working for more than 24 hours to try to control the fire.

No injuries to residents or students have been reported but at least one firefighter was taken to hospital for burn injuries, the city said.

Heavy smoke hung over parts of Cape Town and people were advised to cover their faces with wet towels or rags while being evacuated.

On Sunday, the fire badly damaged the University of Cape Town’s Jagger Library, where important archives and book collections were kept.

Cape Town mayor Dan Plato said some valuable works were lost but many were saved by roller doors that were activated to seal off parts of the library.

“It is tragic that literary treasures have been lost at the UCT library but I have been informed that some of the most valuable works were saved,” Mr Plato said.