Putting out a fire is read as calming a heated situation or bringing a strong emotion under control. Tradition also links it to ending something that burned too long.
When this appeared in your dream, what were you feeling?
My Cosmic Code has a private dream journal. Write a dream down and the app picks out the symbols in it, shows what dream books say about them and, over time, which words recur across your entries. The journal is stored on your device only.