If your house was on fire, you wouldn't have time to think about which 3 things, okay?
But if you were sensible and had pre-thought the possibilities, you'd have your keys with you and your passport is in a fireproof waterproof container, no?
I just dealt with a full-on one in my house, last year, remember? ...the night after I found your webforum? I saw a neighbour home in a cab to the pub and came home one hour after leaving a candle under a calendar. The smoke was pouring out onto the front street.
I opened the door, didn't blink or take a breath and fetched the kettle from the back kitchen and put out the fire in the front room where it was smouldering. It was 3" visibility, if that, and no oxygen. The fire was just about to go back up again. It was about a million degrees in here.
I had to crawl out (still without breathing) and open all the back doors and windows. I'm fairly certain the whole place was about to blow up and that I caught it at about 1 minute to meltdown.
My computer was still alive and blinking at me in the far corner, which was amazing. Everything else was covered in thick black toxic soot and I'm still obsessively compulsively washing my hands 20-30x a day after I touch anything, even though I've washed everything 20 times already.
I knew it would take a long time to clean this up, but this is becoming one of the biggest problems a person could possibly have to deal with, equal to or worse than birth, divorce, death, you name it...
take care with candles, neighbours and the rest...
xL