In June 1925, after an earthquake in Santa Barbara McPherson interrupted a radio broadcast to request food, blankets, clothing, and emergency supplies. In 1928, after a dam failed and the ensuing flood left up to 600 dead, McPherson's church led the relief effort. In 1933, an earthquake struck and devastated Long Beach. McPherson quickly arranged for volunteers offering blankets, coffee, and doughnuts. McPherson persuaded fire and police departments to assist in distribution. Doctors, physicians, and dentists staffed her free clinic that trained nurses to treat children and the elderly. To prevent the power from being turned off to homes of overdue accounts during the winter, a cash reserve was set up with the utility company.