How did the inhabitants of Sarajevo survive a 3 1/2-year siege from 1992 to 1996? Specifically, how did they deal with water, food, and heating?
Background: In 2018, Sweden sent out a leaflet "If Crises or War Comes" informing the population on how to prepare for such situations, focusing on water, food, heating, and communication. I cannot find the original source, but someone knowledgeable in the matter told me that a government report claimed that the average Swede is self-sufficient for less than one week. My random sampling among friends and neighbors suggests that this number makes sense. I recently saw the BBC documentary "Death of Yugoslavia" and, comparing the self-sufficiency of the average Swede with the duration of Sarajevo's siege, I can't help wonder.
From the BBC documentary, I understood that the city had no electricity, no gas, and had all roads cut off. No electricity likely means that the water pumps were off-line. Did people take water from nearly rivers? What about in winter?
Roads cut off likely means that supermarkets were empty. How did they get food when today's cities are so reliant on transportation? I am tempted to think it is impractical to store enough food for so many people for such a long time.
No gas likely means no heating. How did people survive the winters?
Apology: I'm sorry if this question comes too early. I understand that the events in this question are very recent and many still suffer the consequences. A weird mixture of admiration, respect, sadness, and grief crosses me while typing these lines.