How did one storm, sweeping across an island only 35 miles wide, cause the second-worst blackout in world ... t cause such grave damage to Puerto Rico or other areas far from help.

SAN JUAN, Puerto ... of Puerto Rico's capital and is home to more than 25,000 people descended from impoverished migrants that arrived in the mid-1900s from the island's rural areas.

For Puerto Rico, the worst of the storm is Tuesday night into early Wednesday. Ernesto will bring gusty winds, flash flooding and up to 10 inches of rain is possible in some areas. Puerto Rico Gov.