If it is a week, a month, or a year, those are all different levels of seriousness, and I'd expect it to be handled differently. If she has damages, she's welcome to sue the bank for recourse.

As an aside it's always a good idea to have a level of resiliency built into your life and avoid single points of failure. Accounts at two different banks, access to credit via credit card (even if you don't carry a balance), etc. Just like with planning for a disaster, while it's infeasible to store food for a year in an apartment, not having 3 days of food and water stored to cover an emergency is also risky: the same planning should extend to financial matters.