Tesla employees are on the ground in Puerto Rico helping to restore power to the islands residents:

In addition to building electric cars, Tesla also sells an at-home battery pack, the Powerwall, that can capture energy generated by solar panels. Tesla is now shipping hundreds of Powerwalls to Puerto Rico as the island continues to suffer from power outages, Bloomberg first reported.

Additionally:

Generators are currently helping power high-priority buildings like hospitals, but power likely won’t return to the entire island for another six months. Tesla’s Powerwall could help bridge the gap in some areas as Puerto Rico works to repairs its electrical grid.