Video captures a severe thunderstorm slamming Sioux Falls, South Dakota, early Monday morning. https://abcn.ws/3O68SAO | ABC News

TORNADO OUTBREAK: Three confirmed EF-2 tornadoes were among at least 11 reported twisters that hit South Dakota and Wyoming, with significant damage in Sioux Falls and questions about why some city sirens did not go off. Alex Perez reports and @Rob Marciano has the forecast. https://abcn.ws/2UPEfoH | ABC World News Tonight with David Muir

Aftermath of severe flooding in Sioux Falls, South Dakota shows large slabs of ice and debris left over as cleanup efforts continue. https://abcn.ws/2Fa4TkP | ABC News

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