About two months ago, my cousin Guillermo happily ventured from picturesque Cuernavaca, Mexico, to 95-degree Southern California. Tourism to Los Angeles and California, in general, has been down this summer, representing a blow to one of the state’s biggest industries. What the numbers sayInternational tourist arrivals to the state fell by 8% in the three months through August, according to data released Monday from Visit California. This is critical because international tourists spend up to eight times more per visit than domestic tourists. Of all the state’s international travelers, arrivals from Canada fell the most (32%) in the three summer months.