G'day all how ya goin..

Bad new just drove my troll home from a friends n the temp gauge went all the way up.. Got it home n there's a hissing coming from near the starter moter n something is loosing water.. Being night time hard to see to much with a torch.. Will investigate more tomorrow just thought if throw it out there for ideas.. Did take it 4wdin earlier today n there was Mud involved lol.. Drove it back from there on 45 min trip n no dramas with heating could it when I high pressure cleaned underneath the car when i got home i may of loosin a hose I'm really hopin so..! Any ideas of hissing n loosin water would be greatly appreciated before I attack it tomoz