Puerto Rico's power grid collapses, leaving island in the dark

Dec 31 (Reuters) - Puerto Rico woke up in darkness on Tuesday morning, after a power grid failure left nearly all of the island without electricity. Around 90% of clients on the island were without power at 9 a.m. local time, according to energy distribution company Luma Energy's real-time portal. It was not immediately clear what caused the collapse, though local media reported that a chain reaction began in the Guayanilla province on the southern coast. A spokesperson for power generator Genera told local TV station WAPA that there was...