In Silver Spring, Md., on Monday, Matt MacCartney was one of many workers dismantling fallen trees that took down power lines. Chip Somodevilla/Getty Images hide caption

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Where you're most likely to be in the path of a derecho, and how often. National Oceanic and Atmospheric Administration hide caption

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Word Of The Day: 'Derecho'

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Doug Jones, owner of Piedmont Biofarm in Pittsboro, N.C., waters vegetables as temperatures in the South soar, Friday, June 29. Triple-digit temperatures are expected for several days in North Carolina. Gerry Broome/AP hide caption

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Branches and power lines littered the nation's capital after bruising storms swept through the Mid-Atlantic region on Friday night. Win McNamee/Getty Images hide caption

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Before the start of the Boston Marathon this morning, a runner grabbed a bottle of water from among the hundreds lined up on a table in Hopkinton, Mass. Stew Milne/AP hide caption

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This photo provided by the Amarillo/Potter/Randall Office of Emergency Management shows Potter County firefighter Matt Dryden standing next to a wall of hail on Wednesday near Amarillo, Texas. The hail was pushed into drifts of up to 4-feet. AP hide caption

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A trio get a closer look at the large waves cresting over the seawall just south of Nome's Front Street in Nome, Alaska, Wednesday., Nov. 9, 2011. Tyler Rhodes/AP Photo hide caption

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Receding Sea Ice Helps Storm Hammer Alaska's Coast

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