Flooding across India, Bangladesh and Nepal has claimed the lives of more than 1,200 people.
Reports say two toddlers were among the victims in and around India's financial capital, Mumbai.
At least 500 of the deaths have been reported in the northern Indian state of Bihar, according to officials.
The Red Cross say due to floods in Assam, some 1.7 million people have been affected in 24 districts and over 75 lives have so far been lost.
Army personnel help evacuate an elderly person and distribute food to people trapped in the flooded area of the Madhubani district of Bihar | Image: Prabhat Kumar Verma/Zuma Press/PA Images
Four districts in Manipur are also badly affected.
The Red Cross there has been providing relief supplies and also released relief items from its prepositioned stocks.
This included mosquito nets, kitchen sets, towels, blankets and bed sheets.
The Irish embassy in New Delhi says Irish citizens should follow local weather and safety warnings:
Irish citizens currently in Mumbai should follow local weather and safety warnings, avoid all unnecessary journeys #MumbaiRains
— Irish Embassy India (@IrlEmbIndia) August 29, 2017
The British Red Cross says a "staggering" 7.1 million people have been affected in Bangladesh alone.
More than one-third of Bangladesh has been submerged by flooding, which is thought to be the most severe in more than a decade.
The Red Cross say families desperately need clean water, food and shelter.