A national shortage of life guards poses a real danger for people heading into the water this summer. Intense training is required to perform water rescues and first aid. Many pools are closed or have cut ours, and some beeches may be unmanned. Austin, texas has 400 d 62 life guards, less than two thirds of the 750 needed to operate at summer pools. In new orleans,. some pools will open just one or two days a week, instead of the usual five or ixnork city has enough to manate pools and its beaches, but as had to cancel its aquatic programmes including free swimming lessons for children. And philadelphia, which has more pools per capita among