Torrential rain in the southwest was set to cause worsening flash floods Monday as the region began to feel the full effects from Tropical Storm Norbert. Despite losing much of its power as well as its hurricane status, Norbert brought floods to parts of California, southern Nevada, and Arizona over the weekend. Monday was set to be the worst day yet - with the hardest hit area north and west of Phoenix. "Today will be the worst of it," said Weather Channel Lead Forecaster Guy Walton. "It will be most severe in the wash areas that are prone to flooding."