A geo-magnetic storm is causing some minor problems as it races toward the Earth.
The storm was spawned by a huge eruption of gas on the sun. A government expert says so far, the storm has interfered with high-frequency airline communications and radio communications for teams on Mount Everest.
But officials say they're not seeing any major problems.
Power companies have been notified and are taking precautions to avoid blackouts. Experts say satellites are also at risk during such storms, but that cell phones aren't likely to be affected unless they rely on satellites.