The Chinese government sent condolences to Mozambique, Malawi and Zimbabwe, which lost hundreds of lives due to disastrous flood in recent days, said the Chinese foreign ministry on Tuesday.

The three countries are all friends of China. Based on the conditions of the disaster, China is willing to try its best to provide necessary support and assistance for the relief work in these countries at their request. 

The number of people killed in Mozambique from Cyclone Idai could exceed 1,000, the president said on Monday, putting the potential death toll greatly more than current figures. 

The official death toll stands at 84 following a powerful storm and floods, which has also left a trail of death and destruction across Zimbabwe and Malawi, with vast areas of land flooded, roads destroyed and communication wiped out.

Speaking on Radio Mocambique, President Filipe Nyusi said he had flown over the affected region, where two rivers had overflowed. Villages had disappeared, he said, and bodies were floating in the water.

"Everything indicates that we can register more than 1,000 deaths," he said.

The cyclone has also killed 98 people and more than 200 are missing in Zimbabwe, the government said on Monday, while the death toll in Malawi from heavy rains and flooding stood at 56 as of last week. No new numbers had been released following the cyclone's arrival in the country.

Caroline Haga, a senior International Federation of the Red Cross official who is in Beira, said the situation could be far worse in the surrounding areas, which remained completely cut off by road and where houses were not as sturdy.

In Beira, Mozambique's fourth-largest city and home to 500,000 people, a large dam had burst, further complicating rescue efforts.

Large swathes of land were completely submerged, and in some streets people waded through knee-high water around piles of mangled metal and other debris.

In the early hours of Monday morning, rescuers launched dinghies onto chest-high waters, navigating through reeds and trees - where some people perched on branches to escape the water - to rescue those trapped by the flooding.

Zimbabwe's treasury has released 18 million U.S. dollars to rebuild roads and bridges, provide water and sanitation and electricity. Families began burying the dead but the death toll is expected to rise.

Many people had been sleeping in the mountains since Friday, after their homes were flattened by rock falls and mudslides or washed away by torrential rains.

In February 2000, Cyclone Eline hit Mozambique when it was already devastated by its worst floods in three decades. It killed 350 people and made 650,000 homeless across southern Africa, also hitting Zimbabwe.