By now you have all read about or seen the news of the big fire that closed Universal Studios yesterday. Initially, the park had hoped to have the fire stopped in time to open its doors by afternoon; ultimately, that had to turn guests away, announcing that the part would not open Sunday.
Just in case you haven't already seen it, here is footage of the fire, which burned down the building housing the King Kong attraction:
According to this article in the Los Angeles Times, the park re-opened at 10am this morning.
The official Universal Studios website has no news of the fire on its homepage, only an announcement that the park will be open for regular hours on Monday.
There is no listing of which attractions may not be back in operation. Since I haven't heard anything about damage to the House of Horrors walk-through maze, I assume it survived the inferno.