Your World Tonight

It’s voting day for three federal byelections in the British Columbia riding of North Vancouver-Capilano, the Ontario riding of Beaches-East York and the Quebec riding of Chicoutimi-Le Fjord.

And: The White House says it’s not a war, but Canadians aren’t taking kindly to the takeover of the name of Lake Ontario.

Also: The search for flood victims in Nepal turns to tunnels under hydro-electric power plants. There’s hope hundreds of workers have taken shelter there and are still alive below.

Plus: U.S.-Iran fighting ramps up again, accused Canadian NATO intern denied bail, coral crisis, and more.

Rescuers in Nepal are drilling and digging through debris as fast as they can. Hundreds of workers are believed to be trapped inside tunnels at five hydro power sites. The number of people killed in last week's flash floods along the border with Tibet has risen to nearly 800, and thousands are still unaccounted for.

Also: The trade war looms large over three federal byelections being held on Monday. Seats are up for grabs in Ontario, B.C. and what's shaping up to be a tight, three way race in Quebec.

And: A new space telescope launched from Florida today. It's being hailed as a giant leap forward in how we search for life beyond our planet. NASA's Nancy Grace Roman Space Telescope will look for cosmic mysteries such as dark matter but also for Earthlike planets that could harbour life. And its relying on some Canadian designed technology to do the job.

Plus: Alberta day celebrations amid separation debate, A disapearing island in B.C., Quebec seniors practicing karate, and more.

Nepal's Foreign Minister says the bodies of hundreds of flood victims have been recovered. But there is not enough space in the country's morgues - so its asking for international help to get freezers to preserve the bodies. Those catastrophic floods have killed more than 670 people in Nepal and Tibet. Nearly 3,000 people are still missing, including 31 Canadians. CBC News is on the ground in Kathmandu with the latest developments.

Also: Spies, as a general rule, don't like to draw attention to themselves. Which is why a conspicuous visit to Moscow this week by the top U.S. spy has set European capitals abuzz. CIA director John Ratcliff delivered a message to members of Russia's security apparatus on Wednesday. The content of that message - and why it needed to be delivered in person - remain a mystery.

And: Donald Trump's order this week to rename Lake Ontario to Lake America is inspiring a wide range of reactions. Everything from anger to eye rolls. The debate over naming, though, is obscuring another issue - the need for Canada and the U.S. to work together in protecting the Great Lakes. The cooperation is ongoing, but some American scientists say the work on their side is being hindered.

Plus: The U.S. and Venezuela's oil deal, Dozens killed in Russia's latest drone strike on Kyiv, and more.

Intensive search efforts for thousands of missing people after the terrible flooding on the border of Nepal and Tibet. More than 30 Canadians are among the nearly 2,000 still missing.

And: Canada’s chief negotiator is speaking out for the first time since trade talks with the U.S. collapsed a week ago. Janice Charette says the government is willing to get back to the table, under the right conditions.

Also: Politics can be stressful — reading about it, thinking about it, listening to it. Contested elections. Referendums. Trade wars. Renaming lakes. Researchers say it's also bad for our health.

Plus: Canada’s GDP rebound, Alberta data centre pushback, Grand Theft Auto video game leak, and more.

President Donald Trump says Lake Ontario will now be known as Lake America in the U.S.. The move adds insult to the injury of extra tariffs.

And: Rescue teams search for hundreds of missing people — including more than two dozen Canadians — along the Nepal-Tibet border. A torrent of water and mud ripped through several communities yesterday.

Also: Jurors have begun deliberating in the trial of a Massachusetts woman accused of murdering her three children in 2023. The case has put severe post-partum mental illness in the spotlight.

Plus: Cash bail rules in Ontario challenged, Quebec election kicks off, and more.