Edmonton Journal by Dan Healing (Calgary Herald).  The oil and gas industry moved to shut down vulnerable facilities throughout southern Alberta as a deluge of water from the Bow and Elbow rivers cut off their downtown Calgary head office towers Friday.  Thousands of workers were told to stay home overnight Thursday on the advice of civic officials and in reaction to power and potential natural gas supply cutoffs.  "The directive to our folks out in the field is shut in anything you think is in danger," said Rob Evans, spokesman for ConocoPhillips Canada.