In pictures: Maria aftermath on Puerto RicoGetty ImagesPuerto Rico braced for life-threatening flash flooding on Thursday after Hurricane Maria unleashed torrential rains and knocked out power across the islandGetty ImagesThe island was expected to receive up to 30 inches (76cm) of rain by SaturdayGetty ImagesThe full extent of damage is unknown as dozens of communities remain without power, authorities sayGetty ImagesMaria is the second devastating storm to lash the Caribbean this monthGetty ImagesThe powerful storm caused at least one death in Puerto RicoGetty ImagesPuerto Rico Governor Ricardo Rossello has described Maria as "the most devastating storm in a century"ReutersRecovery efforts are under way as crews work to remove downed trees and scattered rubbleGetty ImagesDominica is still reeling after Maria ripped through the Caribbean island a day earlier, killing at least seven peopleReutersMaria caused flooding and left two people dead in the French territory of GuadeloupePuerto Rico may be months without power