Just wear a high visibility jacket, and you'll be fine. Don't worry about it.
As for the ref calling it off, I remember away games at Leicester (c1986) called off at 20 minutes due to a monsoon at 0-0. Also, and more annoying, away to Forest due to fog in the 70's. Saints were winning 1or2-0 at the time after about 70minutes and Forest looked hopeless. By the timeof the rematch Forest had picked up form and beat us easily , 3-0 from memory.