Schools in New Delhi have been closed after heavy monsoon rains battered the Indian capital and caused landslides and flash floods in the country’s north, killing at least 15 people over the last three days.

The torrential rain over the weekend left parts of New Delhi overflowing with water that submerged roads and stranded residents.

India’s northern states were the worst affected, with 10 people killed in flash floods and landslides in Himachal Pradesh and Uttarakhand, according to the Press Trust of India news agency.

One person died in New Delhi and four were killed in the Indian-controlled section of Kashmir.

Landslides triggered by the rains disrupted traffic on key roads in Uttarakhand state in the Himalayas, prompting warnings for residents not to venture out of their homes unless necessary.

Authorities used helicopters to rescue people while bridges and houses were swept away in neighbouring Himachal Pradesh.

India’s weather agency has forecast more heavy rains in the north in the coming days. It said monsoon rains across the country have already brought about 2% more rainfall than normal.

The country regularly witnesses severe floods during the monsoon season, which runs between June and September and brings most of South Asia’s annual rainfall. The rains are crucial for rain-fed crops planted during the season but often cause extensive damage.

Scientists say monsoons are becoming more erratic due to climate change and global warming, leading to frequent landslides and flash floods in India’s Himalayan north.

In neighbouring Pakistan, which has also been pelted by monsoon rains, authorities were on alert for the season’s first flooding after India diverted waters from dams into the Ravi River, which flows from India into Pakistan.

Evacuations are under way from the lowlands in eastern Punjab province, according to Pakistan’s disaster management agency.

More than 150 people were moved overnight from the villages in Narowal and Sialkot, officials said.

At least 76 people have died in Pakistan in weather-related incidents since June 25 as heavy rains affected tens of thousands of people in the Islamic nation.

Pakistan said New Delhi had informed Islamabad about the release of water into the Ravi, as it is required to do under the 1960 Indus Water Treaty brokered by the World Bank.

Cash-strapped Pakistan is still struggling to recover from last summer’s flooding that killed 1,739 people and caused damage worth an estimated 30 billion dollars (£23 billion).