• Floods may persist if monsoon rains continue, says Met Office.
• 650 medical teams on ground to provide treatment to affectees.
  
• Around 470,000 people seek refuge in 3,500 shelters.
  

The death toll from devastating floods caused by relentless monsoon rain and overflowing rivers in Bangladesh has risen to 23, with around 1.24 million families stranded across 11 districts, officials said on Monday.

As floodwaters recede slowly, many of the 5.7 million affected people remain isolated and in urgent need of food, clean water, medicine and dry clothes, above all in remote areas where blocked roads have hindered rescue and relief efforts.

The Bangladesh Meteorological Department said that flood conditions could persist if the monsoon rains continued, as water levels were receding very slowly.

Around 470,000 people have taken refuge in 3,500 shelters in the flood-hit districts, where around 650 medical teams are on the ground to provide treatment, with the army, air force, navy, and the South Asian country's border guard assisting in rescue and relief operations, authorities said.

Vast areas of land are submerged, posing a significant threat to crops if the floodwaters linger for an extended period, agriculture ministry officials said.

An analysis in 2015 by the World Bank Institute estimated that 3.5 million people in Bangladesh, one of the world's most climate-vulnerable countries, were at risk of annual river flooding. Scientists attribute the exacerbation of such catastrophic events to climate change.

"Countries like Bangladesh with negligible emissions and whose people have shown super resilience deserve immediate funds to address the impacts of climate change and frequent disasters," said Farah Kabir, director of ActionAid Bangladesh.

"We need to recover from the losses and damage we have faced, as well as build resilience to future impacts and take on green development pathways."

In one of the worst-hit districts, Noakhali, 56-year-old Shukuri Begum lost her home as it was swept into a pond by the floodwaters, according to ActionAid. Terrified, she fled with her grandchildren to a neighbour's house, but couldn't stay there long as it was no longer safe.

"I have a son with physical disabilities, and we couldn’t bring him with us. We had to stack beds and leave him on top, hoping he would be safe. I don’t know what’s waiting for us," ActionAid quoted her as saying.