In the ionosphere, you often get irregularities. They occur naturally with the aurora. We call it space weather. These irregularities affect radio, communication and navigation systems, especially at higher latitudes.  When you have strong events, solar storms, it affects the electric currents. In extreme cases you can get blackouts and transformers can burn down.

These events are rare but they can happen. It happened in Quebec some years ago. They had a major blackout.