Photos: Devastation following Harvey

Two friends make their way through floodwaters.
Friends Franklin Halloween, 16, left, and Deleon Gambel, 14, fight the current from the overflow of Buffalo Bayou as they make their way through floodwaters from Tropical Storm Harvey while checking on neighbors in their apartment complex in Houston on Sunday.
LM Otero | AP

Rescuers answered thousands of desperate calls for help Sunday as floodwaters from the remnants of Hurricane Harvey rose high enough to begin filling second-story homes, and authorities urged stranded families to seek refuge on rooftops.

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