More than 130 people have been killed in heavy rains in Yemen since mid-July, according to authorities in the rebel capital Sana’a.
Dozens of others were also injured.
The floods caused extensive damage to historic sites in the Old City of Sana’a, a Unesco World Heritage site.
The city is home to hundreds of distinctive brown and white houses, which date from before the 11th century.
They have long been threatened by the decay and violence of war.
One resident, Muhammad Ali al-Talhi, told Reuters news agency that he and his family were homeless after the old building they lived in was destroyed on Friday.
“Everything we had is buried,” he said.
More than five years of conflict in Yemen has led to what the UN describes as the world’s worst humanitarian crisis.
- Crisis in Yemen: Why is there a war?
- Humanitarian crisis in Yemen nearing breaking point
Millions of people depend on food aid, and the coronavirus is believed to be spreading – largely unreported – across the country.
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