Sherika Cook, center, sings an a cappella version of Sam Cooke’s “A Change is Gonna Come” Tuesday during the fourth annual Summer Solstice Rally put on by Preble Street’s Homeless Voices for Justice in Portland. Cook was homeless last year but now has an apartment. The noon event, which drew about 50 people to Post Office Park, calls attention to the need for shelter, water and bathrooms during the summer, when the city’s homeless population rises. With Cook is friend, Tillman Texeria, left, and Dee Clark, an organizer of the event.