You should definitely get this checked out, it is probably a very simple fix to re-connect wherever your ground is disconnected. This is definitely something that should be checked out. It really has little or nothing to do with lightning protection, and much more to do with your family's personal safety, especially anywhere water or dampness is involved (basement, outside outlets, kitchen, and bath)
Generally, houses can have two points of ground - one to a metal water pipe within 5 feet of where it enters the house from the well, and one or more copper or galvanized ground rods, six feet in length, driven completely in the ground and buried a few inches underground.
Your main ground will be a bare copper wire nearly as thick as a pencil. It may be connected in your meter base or in your main breaker panel.
Have you had any plumbing work done recently? It may be possible that your water pipe ground was disconnected to do the work, and forgotten to be re-connected.
What about landscaping or any digging near where your main electrical wire comes to the house?
You don't by chance have some lights in your house dimming, while other lights get brighter? If you do, turn off your main breaker immediately and call the power company. A disconnected or 'floating' neutral is the problem, and it would be compounded by the lack of a house grounding system. The power company would need to fix the problem at their transformer on the pole, and you will need to re-connect your house grounding. A floating neutral is a major problem, and can send 240 volts through all of your 120 volt outlets and appliances, destroying all of them, and possibly starting a fire. BAD news. Enough of scaring you.
As Gary said, I'd check the grounding in your breaker panel, and any subpanels you may have. Turn off the main breaker and tighten up ALL the screws on your neutral and grounding bus bars. They can and do loosen up over time. Whil your main breaker is off, it wouldn't hurt to re-tighten all of the hot wires coming off of the branch circuit breakers. DO NOT touch the feed wires coming in, or the screws/ allen head bolts that the main feed wires connect to on the main breaker. Those are still hot. Your husband likely knows all this, but in case you get ambitious, you should know what you're looking at.
John