Unoccupied homes need to be protected from mold.
If the home has not been abandoned, it is best to keep the electricity on, so that the air conditioner can run during the summer and help deal with excess humidity.
A dehumidifier can also be run, for the same purpose. Mold-infected items need to be removed from the home, and if necessary, a mold remediation company can be engaged. Any existing mold can not be ignored because the problem can only grow.
If you’re in California, you might want to give us a call and see about getting an assessment from Byebyemold.