From the UNHCR press release.

3 million people, 11% of Yemen’s population, have been forced to flee their homes since March of 2015. About 1 million of those people now may be trying to return home due to worsening conditions in the country.

“It’s testament to how catastrophic the situation in Yemen has become, that those displaced by the conflict are now returning home because life in the areas to which they had fled for safety is just as abysmal as in the areas from which they fled.”