2000 Pine Lake Tornado leaves 12 dead
2000 Bastille Day Event, a powerful solar flare causes a geomagnetic storm on Earth.
A solar flare is a release of energy from the sun often accompanied by a bright flash. If solar flares are intense enough a coronal mass ejection can occur. This is a cloud of electrons, ions and atoms that is emitted into space, they often reach Earth in a day or two disrupting long range radio communications.