Greetings! As of current update, I have had two dupes contract hypothermia simply from digging on the watery areas on top of my main base, to get the water flowing down. I understand water is cooler than dupes, but contracting hypothermia from standing on 23°C water? I have swimmed in water ten degrees colder than that without any health concerns. Disease system could probably use a tweak.
Have dupes stand in fresh (not even cold) water for a moderate amount of time