If access to a city is blocked food supplies can quickly plummet, electricity and water can become scarce, and people can be forced to find new ways to feed themselves. Black markets thrive and some may risk their lives to feed their families, but creativity and compassion may also flourish and a food shortage can inspire ever greater heights of inventiveness.
Emily Thomas meets people who have lived under siege in Aleppo, Syria, and Sarajevo, Bosnia-Herzegovina. A journalist reveals how it feels to feast in a cafe in the middle of a city where most are struggling to eat, and an electrician explains why feeding cats in the middle of a war-zone felt like a message of compassion and resistance.
We also hear about the Palestinians living under the blockade of the Gaza strip. A cook explains how to run a catering company when electricity, water and some ingredients are scarce.
This programme was originally broadcast on August 1 but has since been re-edited to provide more context about the Gaza blockade and to distinguish this more clearly from conditions in Aleppo and Sarajevo.
(Photo: A group of men share a meal on the street in war-torn Syria. Credit: BBC/ Getty Images)