DHAKA, Bangladesh (AP) — Floodwaters have stranded hundreds of thousands of people in India’s northeast and neighboring Bangladesh’s eastern region, causing at least 15 deaths as rescuers struggled to reach those who needed help, officials and media reports said Thursday.

A team from the National Disaster Response Force (NDRF) transports people to safety through a flooded area following incessant rains in Agartala, north eastern Tripura state, India, Thursday, Aug. 22, 2024. (AP Photo/Abhisek Saha)

At least 11 people were killed and thousands displaced from homes as floods and mudslides have ravaged India’s northeastern Tripura state, bordering Bangladesh, since Wednesday.

Another four were killed in Bangladesh as upstream India and downstream Bangladesh share common rivers along their border.

India’s Meteorological Department issued a “red” alert in Tripura on Wednesday, forcing authorities to announce a two-day closure of schools after heavy rains inundated several regions, including the state's capital, Agartala.

Authorities have opened more than 300 relief camps in Tripura, where the number of people shifting to the camps was estimated to run into thousands.

Of the 11 dead since the rains intensified Monday, seven drowned or washed away while four were buried by mudslides.

“We are closely monitoring the situation and are focusing on providing relief to those displaced from their homes,” Tripura’s Chief Minister Manik Saha said.

In Bangladesh, a pregnant woman died after she fell into raging waters at Akhaura in Brahmanbaria district, Bengali-language Kal Bela newspaper reported. Three other people died from drowning and electrocution, it said.

The rains and the rising waters from upstream Tripura state devastated many areas in eastern Bangladesh. Many in the worst-hit districts such as Cumilla, Feni and Noakhali called for rescue as power was cut and road links were disconnected. Travel and communication were severed between the capital, Dhaka, and the southeastern port city of Chattogram as parts of a major highway were under water.

The Bangladesh Flood Forecasting and Warning center said Thursday that the water levels in many rivers in the delta nation’s eastern, northeastern and southeastern regions were still increasing.

About a dozen volunteers who rushed to the scene with boats and speedboats in the region told The Associated Press by phone that they were struggling to reach many of the affected people as they failed to communicate with them because the victims’ mobile numbers could not be reached. Many areas have no electricity, the government said.

“We are taken shelter at a house where about 35 people need to be rescued soon. The water is still rising and now we are on the rooftop with our small kids and elderly family members,” Sonia Akter, a mother of 2-year-old girl, told AP by phone from the scene at Feni. “Please send us a boat. Please save us.”

The military and other authorities have started rescue operation in the region, the authorities said.

While the both neighbors have been affected in the flood, many Bangladeshis blamed India for the flash floods, saying that India opened a river dam in Tripura, causing sudden floods in Bangladesh. India’s Ministry of External Affairs denied that in a statement.

Monsoon rains in South Asian nations India and Bangladesh typically begin in June. India and Bangladesh share 54 common rivers that flow from the Himalayas to the Bay of Bengal. The countries have contention over the sharing of waters of the common rivers.