Just wondering but why would Sub Terra and Gloomy Woods be the only rides closed?
Yes, Sub Terra is closed however Gloom Woods is an area of the park and not a ride. The whole Gloomy Woods area and contained rides are currently closed.
On another note I must say the situation appears serious. It's not like they've just shut a ride, but a whole entire area of the park and a popular one at that. The monorail is also closed indicating they don't want you to see what's happened. It could be a bad accident with one of the guests (a ride safety failure or something).
I'm interested to know what's going on.