First thing first,
1, get your documentation in order, document everything, time on site , no of people on site , time of calls , sizes, inc height length , width of wet areas , get customer to sign all this off.
2,Next , photograph ,,, click click click ,, you can not have too many.
3, very important get customer to sign to say they will pay for your work in the event of insurance co not paying out.
4, once the above is complete , you can feel confident removing wet materials, cleaning, applying sanitizer etc.
5, after all that you can think about drying out.... but that is a whole different subject.