An anonymous reader shares a report: Seven months after Hurricane Maria devastated the island of Puerto Rico, the power grid is still unstable. But progress was being made; according to CBS, less than 10 percent of the island was without power as of a month ago. But now, the Associated Press reports that the island is undergoing yet another full blackout. The power company is still investigating the cause and estimates it will take 24 to 36 hours for power to be restored. The saga of Puerto Rico's power grid has been an unhappy one. The US territory was already facing a financial crisis before the hurricane hit. The island only has one electric company, and prior to Maria, it was $9 billion in debt and utilizing outdated infrastructure and equipment.