Iran Press/ Africa: The floods have left thousands homeless, knocked out power and water services and disrupted operations at one of Africa's busiest ports, Durban, media outlets reported.
A provincial economic official estimated the overall infrastructure damage at more than 10 billion rand ($A924 million).
The province's premier, Sihle Zikalala, said on Sunday the death toll had risen to 443, with a further 63 people unaccounted for.
In some of the worst-affected areas, residents said they were terrified by the thought of more rain, which was forecast to fall on Sunday. Some faced an agonising wait for news of missing loved ones.
"We haven't lost hope. Although we are constantly worried as (the) days continue," said Sbongile Mjoka, a resident of Sunshine village in the eThekwini municipality whose eight-year-old nephew has been missing for days.
In a nearby semi-rural area, three members of the Sibiya family were killed when the walls of the room where they slept collapsed and four-year-old Bongeka Sibiya is still missing.
President Cyril Ramaphosa's office said late on Saturday he had delayed a working visit to Saudi Arabia to focus on the disaster. Ramaphosa will meet cabinet ministers to assess the response to the crisis.
KZN Premier Zikalala told a televised briefing that the floods were among the worst in his province's recorded history.
"We need to summon our collective courage and turn this devastation into an opportunity to rebuild our province," he said. "The people of KwaZulu-Natal will rise from this mayhem."
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