I suggest sponge baths!
As inconvenient as it will be, you are fortunate the OC is paying for the repairs.
If you owned a Torens Title house you would have to organise the plumbers/builders and pay for the repairs, as well as sponge bath or go to a family or neighbour’s place to shower/bathe.
If the repair involved toilet waste as well, I have seen homes with a porta-loo out front for the residents to use.
It will be good practice for the promised power strikes (in NSW).