Patio Wall leak. Help..!!!

Hi, This is my first thread on the forum and this is my first house so please excuse me if I end up asking silly questions. I have a patio on the 2nd floor right above my garage. 2 side of the patio shares common wall with two room on the 2nd floor. The other two side are facing the street. I guess they are about 4 feet wall and seems like water is leaking from the top of that wall into my garage. Also this wall are not block wall. They are wooden with stucco on it. Please see the following pictures. Two wall facing the street: