Rescuers are trying to reach remote villages in Mozambique where a powerful cyclone caused widespread devastation.
There are fears thousands of people may be trapped as heavy rain and high winds risk more flooding and landslides.
Cyclone Kenneth struck on Thursday with winds of 220km/h (140mph), barely a month after Cyclone Idai killed more than 900 people across three countries.
Thousands of homes have been flattened, power lines damaged and low-lying areas deluged by the storm.
The BBC’s Pumza Fihlani reports that the damage to the power lines in parts of northern Mozambique is making communication difficult.
Almost 20,000 people have taken shelter in makeshift displacement centres, including schools and churches, our correspondent adds.
A UN spokesman said a total of five people have now died, quoting Mozambique’s government, according to reports.
One person was earlier reported to have been killed when Cyclone Kenneth struck after being crushed by a falling tree. The storm also killed three people on the island nation of Comoros.
Is this unusual for the region?
UN weather experts say it is unprecedented for two cyclones of such intensity to hit Mozambique in the same season.
The World Meteorological Organisation (WMO) also said that no previous records show a cyclone striking the region as far north as Kenneth.
It said a fact-finding mission would examine the “impact of climate change and sea-level rise on Mozambique’s resilience” to extreme weather.
Amnesty International’s secretary general Kumi Naidoo said the two storms were “exactly what climate scientists warned would happen if we continue to warm our planet beyond its limits”.
“There is one inescapable and burning injustice we cannot stress enough,” he said, adding: “The people of Mozambique are paying the price for dangerous climate change when they have done next to nothing to cause this crisis.”
What was Kenneth’s impact?
Kenneth made landfall on the northern province of Cabo Delgado on Thursday evening, with wind speeds equivalent to a category four hurricane.
Winds eased on Friday, but France’s meteorological agency said up to 800mm of rain was expected to land on Mozambique over the coming days – nearly double the 10-day accumulated rainfall that flooded the port city of Beira during Cyclone Idai.
The UN’s World Food Programme said it was working on an “emergency preparedness plan” with the Mozambican government and other humanitarian groups.
“The most difficult thing is transportation – we don’t have helicopters yet,” Capt Kleber Castro from a Brazilian rescue team said. “We need a lot of support.”
Mozambique’s National Institute of Disaster Management (INGC) said 30,000 people had been evacuated from affected areas.
What is the affected area like?
Cabo Delgado province is not as densely populated as the area hit by Cyclone Idai, and there is apparently more high ground there.
But reports said many thousands of homes had been flattened by the winds, and the area has been hit by militant Islamist violence in recent months, which could complicate humanitarian operations.
Thousands of people had already fled their homes to seek shelter from violence in camps for displaced people.
What about other countries in the region?
Comoros is still reeling from damage caused by the cyclone, and in some southern areas of neighbouring Tanzania, authorities have ordered schools and businesses to close.
The International Federation of Red Cross and Red Crescent Societies shared images of the damage on social media. In a tweet, the group confirmed it had volunteers on the ground assisting communities.
Despite Zimbabwe being further inland, officials there said they were also putting their disaster management agencies on alert.
“Drawing lessons from Cyclone Idai we cannot take chances any more,” said Department of Civil Protection director Nathan Nkomo.
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