Excerpt: Chevron, BellSouth and other companies are setting up tent cities for homeless employees. Northrop Grumman handed out paychecks in a parking lot yesterday. Dow Chemical placed ads in at least 14 newspapers asking missing workers to make contact with the company. Marathon Oil is knocking on doors, looking for employees. Across the devastated Gulf Coast, big employers are trying to find, house, feed, pay and otherwise care for tens of thousands of workers chased from their homes[.]