Becca Meyers on Thursday became the second Baltimore-area swimmer in two days to break a world record at the 2014 Pan Pacific Para-Swimming Championships in Pasadena, Calif.

Meyers, of Timonium, swam her morning preliminary in the women's 400-meter freestyle S13 race in 4 minutes, 25.31 seconds, besting the five-year-old mark of 4:28.64. Meyers went on to win the gold medal in the event during the evening final with a 4:25.58.

The event, not contested at the 2012 Paralympic Games, where Meyers made her Paralympic debut with a silver and bronze medal, is slated for inclusion in the 2016 Games in Rio de Janeiro.

"I'm really, really happy with my swims today," Meyers, a student at Franklin & Marshall, said in a news release on teamusa.org. "I'm so happy that I finally broke the world record in the 400 free. I'm excited that it's going to be a Paralympic event in 2016, and I'm glad to have the world record as we head into it."

She's not content with just one world record here at the Rose Bowl Aquatics Center.

"I'm hoping to break the world record in the 200 [individual medley] on Saturday and the 100 free and 100 breast on Sunday, I just hope to get good times," Meyers said.

On Wednesday, the first day of the championships, Ian Silverman of Baltimore broke a nearly 13-year-old world record in the men's 400-meter freestyle S10 race.

Australian Daniel Fox set two world records on Day 2, first swimming a 25.18 in the men's 50 free S14 prelim, then swimming a 24.77 in the final. Daniel Diaz of Brazil swam a world-record 31.94 in the men's 50m free S5 final.

Team USA leads the medal count through Day 2 with 50 medals (13 golds, 21 silvers and 16 bronzes). Australia is second with 37 medals (22, 11, 4), and Canada is third with 25 (3, 10, 12).

On Thursday, Team USA won 23 medals, including five gold medals. Cortney Jordan of Henderson, Nev., swam a 5:28.37 in the women's 400 free S7 to secure gold, and Jessica Long of Baltimore swam a 4:42.91 in the women's 400 free S8.

"I'm happy with my swims, but for me, it's not about winning right now, it's about learning," said Long, a 12-time Paralympic gold medalist who recently relocated to the North Baltimore Aquatic Club. "The Pan Pacs are a learning experience. I'm learning how to apply my new training. I'm learning where I can still improve. I'm really thinking about my races, what I'm doing and I'm taking that back with me so I can apply it later."

In his first major international event since the London 2012 Paralympic Games, where he won two gold medals and a silver medal, retired U.S. Navy Lt. Brad Snyder of Baltimore swam a 1:03.66 in the men's 100 fly S11 and a 26.42 in the men's 50 free S11 for back-to-back golds. After winning the 400 free S11 on Wednesday, he now has three titles from the 2014 Pan Pacific Para-Swimming Championships.

"Today, I was really happy with that 100 fly," he said. "I think that's a breakout swim for me. I think it proves that I have a little bit more strength maybe than I had in London. I was able to do it better here than I did at the 2012 Paralympics. The 50 was not quite as fast as I wanted it to be, but I'm happy. It's good to be out there again. It's good to be competitive. I'm looking forward to bring the momentum that I'm generating here to the world championships and on to Rio."

The 2014 Pan Pacific Para-Swimming Championships is the largest competition of the year for U.S. swimmers. Competition is daily through Sunday. Live results are available with the Meet Mobile app.

Other top events on the Road to Rio include the 2015 world championships in Glasgow and the 2015 Parapan American Games in Toronto. The 2016 Paralympic Games are Sept. 7-18 in Rio de Janeiro.