Yemen’s Houthi rebels are appealing for help as heavy seasonal rains and deadly floods put centuries-old buildings in jeopardy in the Old City of Sanaa, some of which have already collapsed.

“We send a distress call to the whole world and international organizations, particularly the UNESCO and other world heritage centers, to save the ancient city of Sanaa,” the Iran-aligned Houthis said in a statement.

UNESCO, the United Nations’ cultural body, added the Old City to its list of World Heritage sites in 1986 for its 103 mosques, 14 hammans and more than 6,000 houses dating back to before the 11th century. The Old City, which has been inhabited for more than 2,500 years, is also on UNESCO’s list of sites in danger, along with Yemen’s Old Walled City of Shibam and the Historic Town of Zabid.

The Houthis seized the capital Sanaa from the government in 2014 and now control much of the country's north. Muammar Al-Eryani, the information minister in Yemen’s internationally recognized government, blamed the rebels for failing to restore and maintain the historic buildings. He also issued an urgent appeal calling on UNESCO to intervene.