How old is the house?
Was it built in the 1990s(?)-2003(?) when Chinese Drywall was used and since then have found it to be eating up household electrical wiring in the walls?
If you do a google search, it will show you how to do some basic inspections for this issue.
Also, having lived in Houston Texas, i.e. the Land of Telephone Poles and above ground wiring...that stuff will cause what you describe when there is a breeze.
Also, foundation issues, another SE Texas joy....can cause what you describe.
