BBC Sport:
"The referee will now check the pitch at 20:35. If he's happy, there will be a 10-minute warm-up period and the game will restart with six minutes played and Scotland 1-0 up.
If it's still not right, it seems we'll play at St Mirren Park in Paisley tomorrow."
Talking of rivers, there's plenty of water on the Hampden pitch tonight. Players are off for 20 minutes whilst the groundstaff sort it out.
@Tom Hark Preston Park is on his way up there now with a mop and bucket.