Heavy monsoon rains have triggered severe flooding over huge areas in Nepal, India and Bangladesh.
More than 41 million people have been affected, with hundreds of thousands losing their homes, crops and livelihoods.
Over 1,200 people have already died and many more are at risk from hunger and disease. Across the three countries, thousands of health facilities, roads and schools have been destroyed.
The Red Cross and Red Crescent are distributing food, clean drinking water, blankets and essential supplies to thousands of people. Mobile teams are also providing medical care.
See how were helping in Bangladesh in the video below and please help us to do more now: