In India’s northern Himachal Pradesh, at least 15 people lost their lives late Tuesday when a large landslide struck a bus, according to local officials.

The bus was traveling on a hilly stretch near the Bilaspur district when a landslide struck following days of torrential rains.

There were at least 20 to 25 passengers on the bus at the time. Nine men, four women, and two children were among those killed, police said.

Officials reported that three children who were hurt in the incident were rescued and are receiving medical care at a nearby hospital, as stated by Sukhvinder Singh Sukhu’s office, the top elected authority in the state.

Rescue operations continued on Wednesday, trying to find other missing passengers who are believed to be dead, police said.

Intermittent rains have lashed the region since Monday, making the fragile mountain slopes unstable.

President Draupadi Murmu and Prime Minister Narendra Modi offered their condolences following the deadly landslide.

This year, severe rains have led to widespread flooding and landslides throughout the South Asian region that encompasses India, Pakistan, Bangladesh, Bhutan, Sri Lanka, Afghanistan, the Maldives, and Nepal.

Flash floods swept away an entire village in India’s northern state of Uttarakhand in August, while at least 44 people were killed in neighboring Nepal over the weekend due to mudslides and flooding triggered by severe rainfall.

The weekend’s heavy rainfall arrived at the end of Nepal’s monsoon season, which usually begins in June and ends by mid-September.

It also left parts of the capital, Kathmandu, flooded and caused the cancellation of all domestic flights on Saturday.

Experts say human-caused climate change is intensifying South Asia’s monsoons, which traditionally run from June to September and again from October to December.

The rains, once predictable, now arrive in erratic bursts that dump extreme amounts of water in short periods, followed by dry spells.