The lights are back on at a couple major hospitals, but most of Puerto Rico is still in the dark — and likely to remain without power for days, weeks or even months.

Hurricane Maria smashed a power grid that would be considered antiquated on the U.S. mainland. Generators are providing power to the few who have them, but nearly all the island’s 1.6 million electricity customers were still without power as of Monday afternoon.

A long delay in getting power restored will mean even more pain for a Puerto Rican economy that is already reeling from a decade-long recession. Every day without power inflicts more damage to the tourism industry, and the lack of electricity could drive even more people to leave the island to find better opportunities on the mainland.