A monster tornado packing winds as strong as 200 mph roared through the Oklahoma City suburbs Monday, pulverizing block after block of homes, wrecking an elementary school and leaving fires burning out of control.

Crews were frantically searching an estimated 30 square miles of wreckage and only beginning to get a sense of the destruction as night fell. Initial reports from NBC affiliate KFOR said at least four people were killed in the suburb of Moore, including a mother and child, and hospitals reported several dozen injured.