Hold down the left mouse button or your finger (on touch devices) and move to aim. Release to shoot a blast of water out of the firehose. The longer you hold the aim in one spot before firing, the steadier the fireman becomes....up to a point. Shots will ricochet off the sides of the screen as well as the top of the screen.
The frenzied fireman grabbed the firehose and ripped the hydrant right out of the ground and proceeded to put a fire out! How he can do that nobody knows. Now that he is highly mobile he's on the move to put out fires everywhere. The problem is the hydrant he carries is awful heavy so his aim is off and quite shaky. Help him put out all of the fires on each level by shooting each fire with a powerful blast from his hose. The blast of water from the hose packs a wallop and can ricochet off objects to put out fires, but be careful as a bad ricochet can easily knock the fireman out. Best to upgrade so he doesn't get knocked out.