Severe thunderstorms cut power to thousands in Ohio and brought damaging wind and hail. Did they spawn any tornadoes? Here's what to know.

However, the most powerful tornadoes, classified as EF5, make up less than 1% of all tornadoes in the United States, and it has been nearly 12 years since one touched down. There have been many ...

The shelters on this list vary in size, ranging from small underground units that can ... so they can practically assure safety if an EF4 or EF5 tornado moves through that particular area ...