SAN JUAN, Puerto Rico (AP) — Waving flags, chanting and banging pots and pans, tens of thousands of Puerto Ricans jammed a highway Monday to demand the resignation of Gov. Ricardo Rosselló in a crisis triggered by the leak of offensive, obscenity-laden chat messages between him and his advisers.

The demonstration appeared to the biggest protest on the island in nearly two decades.

“Finally, the government’s mask has fallen,” said Jannice Rivera, a 43-year-old mechanical engineer who lives in Houston but was born and raised in Puerto Rico and flew in solely to join the protest.

The protest came 10 days after the leak of 889 pages of online chats in which Rosselló and some of his close aides insulted women and mocked constituents, including victims of Hurricane Maria.

The leak has intensified long-smoldering anger in the U.S. territory over persistent corruption and mismanagement by the island’s two main political parties, a severe debt crisis, a sickly economy and a slow recovery from Maria, which devastated Puerto Rico in September 2017.

“The people have awakened after so much outrage,” said 69-year-old retired nurse Benedicta Villegas. “There are still people without roofs and highways without lights. The chat was the tip of the iceberg.”

The crowd surged along the American Expressway despite the punishing heat — toddlers, teenagers, professionals and the elderly, all dripping in sweat and smiling as they waved Puerto Rico flags large and small and hoisted signs.

One group dragged a portable karaoke machine and chanted, “Ricky, resign!”

“This is to show that the people respect themselves,” said Ana Carrasquillo, 26. “We’ve put up with corruption for so many years.”

Rosselló, a Democrat, announced Sunday evening that he would not quit, but sought to calm the unrest by promising not to seek re-election in 2020 or continue as head of his pro-statehood political party. That only further angered his critics, who have mounted street demonstrations for more than a week.

“The people are not going to go away,” said Johanna Soto, of the city of Carolina. “That’s what he’s hoping for, but we outnumber him.”

The territory’s largest newspaper, El Nuevo Dia, added to the pressure with the front-page headline: “Governor, it’s time to listen to the people: You have to resign.”

Rosselló’s secretary of public affairs, Anthony Maceira, said Monday morning he didn’t knew Rosselló’s whereabouts. Asked who was advising Rosselló on staying in office, Maceira said the governor was speaking with his family, and “that carries a great weight.” Rosselló’s father, Pedro, was governor from 1993 to 2001.