Residents and first responders survey the remains of tornado-ravaged homes in Greenfield, Iowa, on Tuesday.
Mandatory Credit:	Charlie Neibergall/AP via CNN Newsource

Residents and first responders survey the remains of tornado-ravaged homes in Greenfield, Iowa, on Tuesday.
Mandatory Credit: Charlie Neibergall/AP via CNN Newsource

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Tornado-spawning storms left multiple people dead in Iowa and now threaten cities from Texas to Vermont

Some Iowa communities are waking up Wednesday to sift through the rubble of now-unrecognizable homes and mourn the deaths of neighbors who were killed by a series of tornado-spawning storms that tore through the Midwest Tuesday and now threaten a much broader swath of the US.