By MARK STEVENSON and JULIE WATSON (Associated Press) MEXICO CITY (AP) — Hurricane Hilary grew rapidly into Category 4 strength off Mexico’s Pacific coast on Friday and could reach Southern California as the first tropical storm there in 84 years, which forecasters warned could cause extreme flooding, mudslides and even tornados. Hilary had sustained winds near 145 mph (230 kph) early Friday, and was expected to strengthen a bit more before starting to weaken.