Failing dam adds to misery of hurricane-hit Puerto Rico

A failing dam has sparked emergency evacuations of two towns in north-west Puerto Rico as the US territory struggled with flooding, an island-wide blackout and other dangers in Hurricane Maria's wake.

The National Weather Service in San Juan said the north-western districts of Isabela and Quebradillas, home to some 70,000 people, were being evacuated with buses because the nearby Guajataca Dam was failing.