"Alert whoever's on watch to the fire, get into a sealed sompartment such as another section of the storage bay or a dedicated pressure shelter if present, and vent it to space, wouldn't count on fire retardant where O2 tanks are part of the equation. Give it time to cool down before reintroducing atmsphere.
As for venting the room while I'm there, I'd rather not. Even with a rebreather, vacuum does nasty things to a Human body, and without an air supply, you'll be unconscious in ten and dead in ninety or so seconds. If a suit utilizing high-pressure breathing mix is present, I'd pass unless I absolutely can't get out of the room, as those are rigid or semi-rigid suits that take a while to put on. Going straight into a suit using low-pressure breathing mix without an hour or so of pre-breathing said low-pressure mixture would give me a nasty case of 'The Bends', also known as 'Diver's Disease', but that takes time to kill you, so such a suit could work. Low-pressures suits are soft or skin-hugging, therefore much faster to put on, too.
The small tanks I'm filling up are stated to contain pure O2, which would either:
- Cause oxygen toxicity and kill you at normal atmospheric pressure.
- Cause The Bends anyway at low ressure. I'm assuming this would be the case, as they are stated to be for use in space suits." - Astrid
Still here, just waiting to be told where we're going.