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This storm brought the highest tornado death toll in the United States since 2013, according to the National Weather Service.
The victims’ ages range from 6 to 89, according to the coroner.
At least seven of the victims were from two families who are related by marriage and lived a few houses apart, Coroner Bill Harris said Tuesday.
Those killed lived in roughly a one-square-mile area of the town of Beauregard, a resilient, community-oriented town of roughly 9,000, said Lee County Sheriff Jay Jones.
Preliminary reports indicate the deadly twister reached an EF-4 category with winds estimated at 170 mph.
As of Tuesday, about seven to eight people remained unaccounted for, said Jones.
ABC News’ Brendan Rand contributed to this report.
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