Inspired by the book Emergency Sex and Other Desperate Measures: A True Story From Hell on Earth, by Kenneth Cain, Heidi Postlewait and Andrew Thomson, the project revolves around the larger-than-life exploits of expatriate NGO workers who find their sanity tested in the face of atrocities, loneliness and primal desires, says THR.
In addition to Crowe, Bello and Beaufoy, Emergency is produced by Bello's manager, John Carrabino.
Bello previously developed another series project for HBO in 2008.
The actress stars in John Wells' film The Company Men and has been courted by the broadcast networks this pilot season.
Emergency would mark the series debut for feature writer Beaufoy.