The area had scarcely recovered from the worst of the Depression when the Second World War suddenly exploded. The southern California area became even more crowded. This time the influx was servicemen on leave or in training at one of the nearby stations, and their families who moved here to be close to them. These new arrivals required spiritual care. This, added to the work that the priests were already doing, became more than could be handled by two men. It was at this time that Father Corcoran was given two assistants, Father Glennon and Father Carroll, who served the parish for the duration of the war. Two demanding tasks that had to be carried out during these years were: the consolation of those who had lost a relative in action; and the work of a very active Volunteer Red Cross, which met weekly in the parish hall to prepare bandages and medicines and to help families that had somehow been affected by the war.

But if Christ the King parish was busy during the war, it was nothing compared to the activity at the end of the forties. The same servicemen who had fallen in love with the California climate, returned as civilians after their discharge, and this time brought their whole families. It would be hard to calculate the exact growth of the area from 1945-1950, but one estimate suggesting a rate of 1,000 people per day seems to small to those who lived here during this period. Since this growth affected all areas of California, Los Angeles (an archdiocese since 1936) felt an acute shortage of priests; and again the task of ministering to the faithful was left to Father Corcoran and one assistant, Father Peter Conroy, and after 1947, FatherJohn Grew. One of the normal responsiblities of any parish priest, keeping the census up to date, became an onerous job: homes that had housed one family had now been remodeled to house two and even three families. Parish associations were called upon to help even more in the ministry of laity to laity.