Fort Worth police officers gathered to pray before joining rescue teams in Houston, and the powerful photo soon went viral.

"Prayer is powerful. We know that," the Fort Worth chief of police Dr. Joel Fitzgerald said. "Sometimes not accepted everywhere."

President Trump declared Sunday a national day of prayer in the wake of the storm's devastation.

Teen Owner of Texas Flag Waved By President Asks For Help for Houston

Dan Bongino on 'Illegal Program' DACA: Spare Me Lectures on Compassion

"Nothing makes us more apolitical than a natural disaster," Fitzgerald told "Fox & Friends" on Saturday, adding that Harvey has pulled his department together.

"This isn't a time to worry about whether we're blue or red or whatever," the police chief said. "It's a time to all pitch in in the spirit of what we're doing here in Texas and solve a problem."

Houston has received help from other cities' police departments, relief groups, and even citizen rescuers who traveled to the area with their private boats.

Report: Feds Predicted Antifa Violence

Cleveland Indians May Drop 'Chief Wahoo' Mascot