'Could have been catastrophic': Fire official credits CO detector in helping save two people

The Building in Waterloo officials responded to after a carbon monoxide alarm went off. (Karis Mapp/CTV News) The Building in Waterloo officials responded to after a carbon monoxide alarm went off. (Karis Mapp/CTV News)

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Daunting recovery underway in tornado-devastated Mississippi

Help began pouring into one of the poorest regions of the U.S. after a deadly tornado wrought a path of destruction in the Mississippi Delta, even as furious new storms Sunday struck Georgia, where two tigers briefly escaped their badly damaged safari park.