The weekend's bitterly cold weather has prompted closure Monday of all Jefferson County and Sisters schools, while broken pipes and flooding have prompted closure of Tumalo Community School as well.
The tornado that destroyed Moore, Okla., is likely to rank among these costliest twisters.
The deadly tornado that destroyed parts of Moore, Okla., will likely be among the costliest twisters in U.S. history. Here are the 10 most expensive tornadoes since 1950:
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