On the edge of crisis, it might be a good idea to rely on the credit cards (if any), but stay away from insane rates and fees of cash advances.
Speaking on this matter, it's interesting did anyone considered Paypal as an tool for getting cash? For example, you can use your credit card to send money to yourself (having Premier account). Once you've received money (pretty instant), you can withdraw them to your bank account, paying 2.9% + 30 cents for each chunk (under $3K).
Keeping in mind that the major credit cards provide cashback or bonuses in at least of 1%, your real cost of getting cash is getting down to 1.9% + 30 cents, which is, I should say, pretty acceptable for the tough times when your only choice is credit card.
I gave it a quick look at Paypal's site and didn't find any notes that make this illegal to use. Basically, why should it be? They're getting they fees so they should be happy enough, right? I never tried this myself though (frankly, I never had any reason to, and hopefully, I'll be able to run on some cash at all times). However, it sounds like a good exit in a bad situation, what do you think?(read more on Everytalks)