What do you think is more likely? That there is not a single stream of water hitting it, or there are plenty of fire fighters at the scene you just happen not to have seen any pictures of them?

I saw on the live stream a couple of water jets, from aerial platforms, at the corners (probably as close as they could get with the trucks). But my guess is that most of the firefighting is happening on the ground level (some of it inside the building), out of sight from the distant cameras.