what does it mean when the lines freeze from not enough antifreeze? on 1997 Mercury Mystique

ok so my fiancee and I thawed out the lines using space heaters and a tarp and then a whole lot of brownish red fluid came gushing out from somewhere under the car, what could the problem be?

Asked by for the 1997 Mercury Mystique
1 answer
the cooling system needs attention,sounds like poss broken heater hose. repair coolant leak,flush entire cooling system and repl with plenty of anti freeze