Heavy downpours in Yemen’s Wasab Safil district forced a dam to burst, the Interior Ministry said, citing witnesses, killing nine people.

Scattered floods throughout Yemen’s northwest region brought rocks tumbling down from hilltops onto buildings. Several homes and a hospital collapsed, killing at least seven. Four people were injured and several remained trapped under the rubble of the hospital, Interior Ministry said.

Yemen’s Civilian Defense Center said the total death toll stood at 23, including some who drowned as flash floods swept through the streets and trapped drivers in their cars.

The heavy rains have also isolated villages in southwest Saudi Arabia, near the Yemeni border, the Saudi newspaper Al-Watan said.

One person was reported dead in the Kingdom, according to the Arabic daily. In Jizan, a Civil Defense team is searching for a man believed washed away by floodwaters after his brother’s body was found.

Defense forces had responded to 100 calls for assistance from people stuck in their cars as floods hit, it said.