The cost of the massive tornado that battered an Oklahoma City suburb could be more than $2 billion.

Oklahoma Insurance Department spokeswoman Calley Herth told The Associated Press that the early damage tally is based on visual assessments of the extensive disaster zone that stretches more than 17 miles and the fact that Monday's tornado was on the ground for 40 minutes.

With no reports of anyone still missing, the Oklahoma medical examiner's office announced that it has positively identified 23 of the 24 people who died in the tornado, and that 10 of those killed are children, said AP.