Nepal, May 21 -- Many people are migrating within countries across south Asia to cope with extreme weather. In Bangladesh, Bhutan, India and Nepal, people often move from rural homes to urban metropolises when their homes and livelihoods become damaged or threatened by cyclones and storms, floods and droughts.

Most previous research has focused on migration of men who move to seek employment and how that affects the women and families they leave behind. But many women also move as a result of climate-related extreme weather.

Migrant households take many forms. My team's research involved collecting data both through surveys and interviews with close to 1,200 households across these countries. Our work reveals a complex picture.

In Indi...