Fifteen people were reportedly killed by lightning strikes in Bangladesh, while four died in landslides. At least nine people have been killed in India's Assam state.
Both countries have called out their armies to help distribute food aid and rescue stranded people, with soldiers using "speedboats and inflatable rafts to navigate through submerged areas," according to AP.
Subscribe to The Week
Escape your echo chamber. Get the facts behind the news, plus analysis from multiple perspectives.
Rain is expected to continue through Sunday, at least, exacerbating what one Bangladeshi government expert described as the region's worst flooding since 2004.
Bangladesh, a low-lying country with more than 130 rivers, is highly vulnerable to flooding. The United Nations Intergovernmental Panel on Climate Change has warned that, due to climate change, some 27 million Bangladeshis may have to be relocated over the next decade.
Continue reading for free
We hope you're enjoying The Week's refreshingly open-minded journalism.
Subscribed to The Week? Register your account with the same email as your subscription.