Cirno can freeze stuff, so why not just partially freeze the shrine, or shoot ice at the fire. Much more effective than freezing water.
Calm down!If this doesn't get extinguished soon, the whole shrine will really be ablaze!But first, kill this idiot!Small fire trouble at the shrine during the feastWe'll do a bucket relay, so everyone help out!Get a move on it! If it burns down, I won't let you go home until it's rebuilt!Ah, God... Please protect the shrine!