Question: What storm affected city 10.0 and 15.0? | do you mean the name of storm that affected city 10 and 15? | Yes
SQL: select T1.Name from Storm as T1 join affected_region as T2 on T1.Storm_ID  =  T2.Storm_ID where T2.Number_city_affected  =  10.0 or T2.Number_city_affected  =  15.0