We ahve to make an emergency out of town tarvel for 10 days. here in Texas temp is around 28-42 right now.
I am planning to shut down the main water valve to house as well as hot water lines to home and drain all the pipes and flush toilet tanks
Plan to put the hot water heater in vacation mode and home temp will be kept around 72 with all the cupboards open
Am I thinking correct ? Do i need to change anything ?
Do I need to cover the toilet lids closed or open ( to prevent freezing/ the water evaporation )
I am going on family emergency and really rattled. Any help will be appreciated

Thanks