I work upstairs from people who do cholera research, and they talk about how cholera patients have five gallons of water coming out of them per day. Not surprisingly, you tend to die both of dehydration and ionic imbalances (heart problems, etc.)

Typically, patients get rehydration and lie in a “cholera cot”, which is a tarp cot with a hole that you put your ass over (google it).

Liquid In, Liquid Out.