Alphabet’s Project Loon has officially deployed its LTE balloons to Puerto Rico, the team announced this afternoon. In a blog penned by Project Loon head Alastair Westgarth, the company says it’s working with the Federal Communications Commission, the Federal Aviation Authority, FEMA, and other cellular spectrum and aviation authorities to bring connectivity to parts of the island still suffering in the aftermath of Hurricane Maria. Loon’s official LTE partner for the initiative is AT&T, which is helping Loon use its fleet of stratospheric helium balloons to bring functions like text messaging and minor web browsing access to Puerto Rico residents who have LTE-equipped smartphones.

“We’ve never deployed Project Loon connectivity from scratch at such a rapid pace, and we’re grateful for the support of AT&T and the many other partners and organizations that have made this possible,” Westgarth writes. “Thanks to the Pan-American and Puerto Rican governments’ aviation authorities and air traffic controllers, who enabled us to send small teams of balloons from our launch site in Nevada to Puerto Rico. Thanks also to SES Networks and Liberty Cablevision who helped quickly set up essential ground infrastructure so that the balloons could get internet connectivity.”

Loon’s balloons have been used in a number of regions across the globe since 2013, including one other high-profile disaster relief effort in Peru after the country was struck with massive rains and extreme flooding back in May of last year. Yet the effort in Puerto Rico marks the fastest deployment, and its aimed at helping nearly 3.5 million residents of the island regain connectivity. As of early October, when the FCC first gave Loon the green light to operate in Puerto Rico, nearly 83 percent of cell towers were still down.