Instead of gravity feed SpaceX now has a deluge system powered by nine Methane-LOX gas generators for greater water volume. It looks like one of the gas generators blew it's top off and the took the roof overhead with it.
No apparent damage to the other pumps or surroundings, so seems simple to replace (if they have a spare).
What does have to be considered are the ramifications if one blows it's top during a launch with any debris hitting the booster and starship......
