Set up cross-ventilation with open windows and fans, so at least the fumes get out of the house faster instead of just sitting there? Not an instant solution, but it might at least speed things up a bit. Although maybe something to do not at the same time as millions of candles; I don't know if they'd like the breeze ;p

If there's anywhere in the apartment that doesn't smell as bad, you could camp out there; sounds like there might not be, though.