Water damage is usually covered by flood insurance which you need to buy separately. Check your policy once though, or ask your insurance agent if you’re covered for water related damage.Homeowners insurance covers sudden, accidental damage. It does NOT cover "maintenance" issues.
So, it depends on what CAUSED the "go". If it's DAMAGED, and the damage was caused by a covered cause of loss, yes. If not, no - but they'll make you fix it anyway.
No this is normal Maintenance and Repairs a home owner is responsible for. Call an electrician. Sounds like a bad circuit breakerNo. However, if the electrical issues start a fire, it will cover the fire damage.