Over the weekend a hurricane knocked out almost all power on the island.
https://www.cnn.com/2022/09/19/weather/hurricane-tropical-storm-fiona-monday/index.html
This is not unexpected by people familiar with the daunting task of rebuilding the island's infrastructure. The under investment in transmission and distribution over a 40 year period left the island with a least a decade of construction on the electric grid, if not more.
Thousands of businesses installed back up generators, and those are likely working hard this morning.
LUMA, FEMA, and the government of Puerto Rico are working hard to make permanent fixes to the grid, but vegetation (trees) grows quickly in tropical conditions, and undergrounding on the island has its own issues (e.g., little to no soil over solid rock). Transmission design done in the 1930's sent power over the mountains, rather than around. The reconfiguration effort is on-going and the sections that are complete, should be back up and running shortly.
Having spent several days without power this summer, I understand what people are gong through, again.
May the people working on the restoration be safe.