It continued to intensify , and at 1200 UTC on October 18 , Wilma attained hurricane status while located about 225 miles ( 362 km ) south-southeast of Grand Cayman .
It continued to strength , and at 1200 UTC on October 18 , Wilma strengthened into a Category 1 hurricane while about 225 miles ( 360 km ) south-southeast of Grand Cayman .