diaz-balart. good evening, we begin tonight with a hurricane barrelling toward the united states that in itself is a major headline, but what makes this storm so historic and so dangerous is where it s heading. straight for southern california it is likely to weaken to a tropical storm before it hits, something that hasn t happened there since before world war ii. right now, hurricane hilary is battering mexico hitting resort towns like cabo san lucas, and cities like tijuana where so many migrants are currently staying. nearly 30 million people across six states are bracing for potentially devastating flooding here s why the storm could bring a year s worth of rain in just 48 hours and the dry, desert lands across the southwest won t be able to absorb it all. officials are already warning some residents to prepare to evacuate priscilla thompson begins our coverage tonight from palm springs, california. reporter: tonight, hurricane hilary bearing down, slamming