By IGNACIO MARTINEZ and JULIE WATSON (Associated Press) CABO SAN LUCAS, Mexico (AP) — A weakening Hurricane Hilary headed for Mexico’s Baja California on Saturday as the U.S. National Hurricane Center predicted “catastrophic and life-threatening flooding” for the peninsula and for the southwestern United States, where it was forecast to cross the border as a tropical storm on Sunday. Officials issued an evacuation advisory for the tourist destination of Santa Catalina Island, 23 miles (37 kilometers) off the Southern California coast, while first responders as far north as Los Angeles scrambled to get the homeless off the streets and into shelters. Hilary was expected to plow into Mexico’s Baja peninsula on Saturday night before rushing northward and entering the history books as the first tropical storm to hit Southern California in 84 years. “I don’t think any of us — I know me particularly — never thought I’d be standing here talking about a hurricane or a tropical storm,” said Janice Hahn, chair of the Los Angeles County Board of Supervisors. The U.S.