Trevor Ault reports as dangerous waves and life-threatening rip currents slam the California coast, with nearly 500 people rescued in the last 48 hours; Morgan Norwood has more on the powerful home explosion that rocked a Canton, Ohio, neighborhood; Faith Abubey reports on the father of a teenage school shooter receiving a 15-year sentence for buying the gun used in the shooting; Aaron Katersky has details after tests on the hair found at the home of Nancy Guthrie, mother of “Today” host Savannah Guthrie, does not point to a suspect in her kidnapping; and more on tonight’s broadcast of World News Tonight with David Muir. 00:00 Intro 02:11 Officials: Nearly 500 ocean rescues made along California coast in two days 05:01 Forecast: Extreme heat alerts threaten 80 million+ 05:40 Powerful home explosion rocks Ohio community 07:02 Investigators looking into possible link between Iran and water system hacks: U.S. officials 08:21 Father sentenced to 15 years in prison for buying gun used by son in school shooting 09:27 DNA update in Nancy Guthrie investigation 11:17 Trump may pull Attorney General pick 13:37 NATO jets scramble as Russian missile hits Poland during attack against Ukraine 14:29 Airline reveals cause of smoke in passenger cabin 16:22 Girl bitten by barracuda in Turks and Caicos 16:53 Husband of missing woman speaks out 17:22 NFL legend Ahman Green reveals Parkinson’s diagnosis 17:42 New Jersey officer, disguised as shrub, catches alleged distracted drivers 18:14 Ben Affleck and Jamie Ding team up and win $1 million for charity ABC World News Tonight with David Muir delivers the news that matters most. Watch to get the latest news stories and headlines from around the world. Follow ABC World News Tonight on... Instagram: https://www.instagram.com/abcworldnewstonight/ TikTok: https://www.tiktok.com/@abcworldnews X (formerly Twitter): https://twitter.com/ABCWorldNews Facebook: https://www.facebook.com/WorldNewsTonight Threads: https://www.threads.net/@abcworldnewstonight ABC News is your trusted source for breaking news, analysis, exclusive interviews, headlines, and videos: https://abcnews.go.com/ Subscribe to ABC News on YouTube: https://bit.ly/2vZb6yP Watch full episodes on Hulu: http://abcn.ws/3bzvQQn #WorldNewsTonight #DavidMuir #News #ABCNews