Water "Pressure"

[Man of San]

So, flooding on most water maps hasnt really been that dangerous, apart from the oxy damage which can relatively easily be countered with oxygen tanks. At most, they are annoying. So, why not add another way of damaging people? If enough of a certain liquid is in a room, it will begin to cause brute damage overtime (this starts specifically when it reaches the 'roof' of whatever room it is in), increasing the more units of the liquid is in. The water pressure damage can be stopped (obviously) with a diving or space suit.