Oh. Crap.
WE'RE DOOOOOOOMED!
*Insert screaming madly in RP format here, before calming down*
Ahem.
We seem to have horrible luck. Solution: Either stack the odds in our favor, or have more rolls to go through (robots with lasers!). The law of averages will save us, or at the very least, prolong our lifespan.
Speaking of robots with lasers, query: How are those generators going? I know it's silly to ask every update, but I want a completion time.

Other random stuff:
Ventilation system, so we can close off more entrances at a time? I know you don't want to, but we need to do something to prevent bad luck from crippling us as much, not to mention increase our defensibility.
Defend one of the open entrances: We'll have to hope the western gate holds out.