Authorities planned Friday to renew the search for “Glee” star Naya Rivera, who is believed to have drowned in a Southern California lake while boating with her 4-year-old son.

Rivera, 33, disappeared after renting the pontoon boat for three hours Wednesday afternoon and taking it out on Lake Piru in Ventura County, the Sheriff’s Office said Thursday.

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A search and rescue team moves past a rental boat at top left that was used by actress Naya Rivera and her 4-year-old son on Lake Piru on Thursday, July 9, 2020, in Los Padres National Forest, northwest of Los Angeles. Authorities said Thursday that they believe “Glee” star Rivera drowned in the  lake but they are continuing the search for her a day after her 4-year-old son was found alone in a rented boat. “Investigators believe Rivera drowned in what appears to be a tragic accident,” a Ventura County Sheriff's Office statement said.  (AP PhotoChris Pizzello)

Authorities planned Friday to renew the search for “Glee” star Naya Rivera, who is believed to have drowned in a Southern California lake while boating with her 4-year-old son.

A patrol boat with a search and rescue dog heads out on Lake Piru Reservoir, Thursday, July 9, 2020, in Ventura, Calif. Authorities said Thursday that they believe Rivera drowned in a Southern California lake but they are continuing the search for her a day after her 4-year-old son was found alone in a rented boat. (AP PhotoChris Pizzello)

The area where the boat was found is about 30 feet (9 meters) deep. Murky waters heavy with plants made it difficult for divers to see more than about a foot ahead of them, sheriff’s Sgt. Kevin Donoghue said Thursday.

A boat covered in caution tape rented by "Glee" actress Naya Rivera sits at a dock while members of Ventura County Sheriff's Office Underwater Search and Rescue Team search for the actress on Thursday, July 9, 2020, at Lake Piru in Los Padres National Forest, northwest of Los Angeles. Rivera's 4-year-old son was found alone on the boat. (AP PhotoChris Pizzello)

Rivera, a Los Angeles resident, had experience boating on the lake in Los Padres National Forest, Donoghue said.

Members of the Ventura County Sheriff's Office search for former "Glee" actress Naya Rivera, Thursday, July 9, 2020, at Lake Piru in Los Padres National Forest, northwest of Los Angeles. Rivera rented a boat Wednesday and her 4-year-old son was found alone on the boat. (AP PhotoRingo H.W. Chiu)

The boy was wearing a life vest and another life jacket was found in the boat along with Rivera’s purse and identification.

Members of the Ventura County Sheriff's Office search for former "Glee" actress Naya Rivera, Thursday, July 9, 2020, at Lake Piru in Los Padres National Forest, northwest of Los Angeles. Rivera rented a boat Wednesday and her 4-year-old son was found alone on the boat. (AP PhotoRingo H.W. Chiu)

She called the boy, her only child, “my greatest success, and I will never do any better than him” in her 2016 memoir “Sorry Not Sorry.”

Sgt. Kevin Donoghue, of the Ventura County Sheriff's Department, second right, addresses members of the media following a press conference as his department's Underwater Search and Rescue Team search for former "Glee" actress Naya Rivera, Thursday, July 9, 2020 at Lake Piru in Los Padres National Forest, northwest of Los Angeles. Rivera rented a boat on Wednesday and her 4-year-old son was found alone on the rented boat. (AP PhotoChris Pizzello)

Co-star Mark Salling, who Rivera dated at one point, killed himself in 2018 at age 35 after pleading guilty to child pornography charges.

CORRECTS SPELLING TO PIRU, INSTEAD OF PERU - A helicopter helps in the search for former "Glee" star Naya Rivera on Thursday, July 9, 2020, at Lake Piru in Los Padres National Forest, northwest of Los Angeles. (AP PhotoRingo H.W. Chiu)

Follow AP Entertainment Writer Andrew Dalton on Twitter: https://twitter.com/andyjamesdalton.

Members of the Ventura County Sheriff's Office search for former "Glee" actress Naya Rivera, Thursday, July 9, 2020, at Lake Piru in Los Padres National Forest, northwest of Los Angeles. Rivera rented a boat Wednesday and her 4-year-old son was found alone on the boat. (AP PhotoRingo H.W. Chiu)

Members of the Ventura County Sheriff's Office search for former "Glee" actress Naya Rivera, Thursday, July 9, 2020, at Lake Piru in Los Padres National Forest, northwest of Los Angeles. Rivera rented a boat Wednesday and her 4-year-old son was found alone on the boat. (AP PhotoRingo H.W. Chiu)

The lake an hour’s drive from Los Angeles was searched by dozens of people, most of them divers, with help from helicopters, drones and all-terrain vehicles. The search to recover Rivera’s body continued into the night Thursday before ending for that day.

A search and rescue team moves past a rental boat at top left that was used by actress Naya Rivera and her 4-year-old son on Lake Piru on Thursday, July 9, 2020, in Los Padres National Forest, northwest of Los Angeles. Authorities said Thursday that they believe “Glee” star Rivera drowned in the  lake but they are continuing the search for her a day after her 4-year-old son was found alone in a rented boat. “Investigators believe Rivera drowned in what appears to be a tragic accident,” a Ventura County Sheriff's Office statement said.  (AP PhotoChris Pizzello)

A search and rescue team moves past a rental boat at top left that was used by actress Naya Rivera and her 4-year-old son on Lake Piru on Thursday, July 9, 2020, in Los Padres National Forest, northwest of Los Angeles. Authorities said Thursday that they believe “Glee” star Rivera drowned in the lake but they are continuing the search for her a day after her 4-year-old son was found alone in a rented boat. “Investigators believe Rivera drowned in what appears to be a tragic accident,” a Ventura County Sheriff's Office statement said. (AP PhotoChris Pizzello)

The area where the boat was found is about 30 feet (9 meters) deep. Murky waters heavy with plants made it difficult for divers to see more than about a foot ahead of them, sheriff’s Sgt. Kevin Donoghue said Thursday.

“If the body is entangled on something beneath the water, it may never come back up,” Donoghue said.

Rivera played Santana Lopez, a singing cheerleader in 113 episodes of the musical-comedy “Glee,” which aired on Fox from 2009 until 2015. She also had recurring roles on “The Bernie Mac Show” and “The Royal Family.”

A patrol boat with a search and rescue dog heads out on Lake Piru Reservoir, Thursday, July 9, 2020, in Ventura, Calif. Authorities said Thursday that they believe Rivera drowned in a Southern California lake but they are continuing the search for her a day after her 4-year-old son was found alone in a rented boat. (AP PhotoChris Pizzello)

A patrol boat with a search and rescue dog heads out on Lake Piru Reservoir, Thursday, July 9, 2020, in Ventura, Calif. Authorities said Thursday that they believe Rivera drowned in a Southern California lake but they are continuing the search for her a day after her 4-year-old son was found alone in a rented boat. (AP PhotoChris Pizzello)

Rivera, a Los Angeles resident, had experience boating on the lake in Los Padres National Forest, Donoghue said.

Surveillance video taken at about 1 p.m. Wednesday shows Rivera and her son, Josey Hollis Dorsey, leaving on the rented boat.

When the boat failed to return, its vendor found the vessel drifting in the northern end of the lake late Wednesday afternoon with the boy asleep on board. He told investigators that he and his mother had been swimming and he got back into the boat but she didn’t, according to a Sheriff’s Office statement.

A boat covered in caution tape rented by "Glee" actress Naya Rivera sits at a dock while members of Ventura County Sheriff's Office Underwater Search and Rescue Team search for the actress on Thursday, July 9, 2020, at Lake Piru in Los Padres National Forest, northwest of Los Angeles. Rivera's 4-year-old son was found alone on the boat. (AP PhotoChris Pizzello)

A boat covered in caution tape rented by "Glee" actress Naya Rivera sits at a dock while members of Ventura County Sheriff's Office Underwater Search and Rescue Team search for the actress on Thursday, July 9, 2020, at Lake Piru in Los Padres National Forest, northwest of Los Angeles. Rivera's 4-year-old son was found alone on the boat. (AP PhotoChris Pizzello)

The boy was wearing a life vest and another life jacket was found in the boat along with Rivera’s purse and identification.

Rivera is believed to have drowned “in what appears to be a tragic accident,” the statement said.

The boy, Rivera’s son from her marriage to actor Ryan Dorsey, was safe and healthy and with family members, authorities said. The couple finalized their divorce in June 2018 after nearly four years of marriage.

Members of the Ventura County Sheriff's Office search for former "Glee" actress Naya Rivera, Thursday, July 9, 2020, at Lake Piru in Los Padres National Forest, northwest of Los Angeles. Rivera rented a boat Wednesday and her 4-year-old son was found alone on the boat. (AP PhotoRingo H.W. Chiu)

Members of the Ventura County Sheriff's Office search for former "Glee" actress Naya Rivera, Thursday, July 9, 2020, at Lake Piru in Los Padres National Forest, northwest of Los Angeles. Rivera rented a boat Wednesday and her 4-year-old son was found alone on the boat. (AP PhotoRingo H.W. Chiu)

She called the boy, her only child, “my greatest success, and I will never do any better than him” in her 2016 memoir “Sorry Not Sorry.”

The most recent tweet on Rivera’s account, from Tuesday, read “just the two of us” along with a photo of her and her son.

It appeared increasingly likely she would become the third major cast member from the show to die in their 30s.

Members of the Ventura County Sheriff's Office search for former "Glee" actress Naya Rivera, Thursday, July 9, 2020, at Lake Piru in Los Padres National Forest, northwest of Los Angeles. Rivera rented a boat Wednesday and her 4-year-old son was found alone on the boat. (AP PhotoRingo H.W. Chiu)

Members of the Ventura County Sheriff's Office search for former "Glee" actress Naya Rivera, Thursday, July 9, 2020, at Lake Piru in Los Padres National Forest, northwest of Los Angeles. Rivera rented a boat Wednesday and her 4-year-old son was found alone on the boat. (AP PhotoRingo H.W. Chiu)

Co-star Mark Salling, who Rivera dated at one point, killed himself in 2018 at age 35 after pleading guilty to child pornography charges.

Cory Monteith, one of the show’s leads, died at 31 in 2013 from a toxic mix of alcohol and heroin.

Rivera was engaged to rapper Big Sean in 2013, but their relationship ended a year later. The pair met on Twitter and collaborated musically, with the rapper appearing on Rivera’s debut single “Sorry.” She married Dorsey a few months later.

Sgt. Kevin Donoghue, of the Ventura County Sheriff's Department, second right, addresses members of the media following a press conference as his department's Underwater Search and Rescue Team search for former "Glee" actress Naya Rivera, Thursday, July 9, 2020 at Lake Piru in Los Padres National Forest, northwest of Los Angeles. Rivera rented a boat on Wednesday and her 4-year-old son was found alone on the rented boat. (AP PhotoChris Pizzello)

Sgt. Kevin Donoghue, of the Ventura County Sheriff's Department, second right, addresses members of the media following a press conference as his department's Underwater Search and Rescue Team search for former "Glee" actress Naya Rivera, Thursday, July 9, 2020 at Lake Piru in Los Padres National Forest, northwest of Los Angeles. Rivera rented a boat on Wednesday and her 4-year-old son was found alone on the rented boat. (AP PhotoChris Pizzello)

Follow AP Entertainment Writer Andrew Dalton on Twitter: https://twitter.com/andyjamesdalton.

CORRECTS SPELLING TO PIRU, INSTEAD OF PERU - A helicopter helps in the search for former "Glee" star Naya Rivera on Thursday, July 9, 2020, at Lake Piru in Los Padres National Forest, northwest of Los Angeles. (AP PhotoRingo H.W. Chiu)

CORRECTS SPELLING TO PIRU, INSTEAD OF PERU - A helicopter helps in the search for former "Glee" star Naya Rivera on Thursday, July 9, 2020, at Lake Piru in Los Padres National Forest, northwest of Los Angeles. (AP PhotoRingo H.W. Chiu)

Members of the Ventura County Sheriff's Office search for former "Glee" actress Naya Rivera, Thursday, July 9, 2020, at Lake Piru in Los Padres National Forest, northwest of Los Angeles. Rivera rented a boat Wednesday and her 4-year-old son was found alone on the boat. (AP PhotoRingo H.W. Chiu)

Members of the Ventura County Sheriff's Office search for former "Glee" actress Naya Rivera, Thursday, July 9, 2020, at Lake Piru in Los Padres National Forest, northwest of Los Angeles. Rivera rented a boat Wednesday and her 4-year-old son was found alone on the boat. (AP PhotoRingo H.W. Chiu)