US President Trump and Canada continued a verbal duel on Saturday over the US government’s administrative renaming of Lake Ontario, with the Ontario premier erecting a giant sign saying “Lake Ontario. Now and Always” – and the American president posting a video of him tearing down an avatar of that sign, erecting a replacement saying Lake America, and dancing to YMCA.

Rhetoric over the naming of Lake Ontario is the public face of an escalating trade dispute between the US and its northern neighbor involving a 50% US tariff on Canadian steel and retaliatory tariffs from Ottawa. Trump’s order for the US government to refer to Lake Ontario as Lake America by Sunday had at least one prominent impact. Google Maps had changed Lake Ontario’s name to Lake America for US users to reflect the president’s executive renaming order.

In a statement explaining why it was acquiescing to Trump’s desired name for Lake Ontario, Google said its practice is to “reflect name changes in official government sources”. Trump’s order affects the US’s federal Geographic Names Information System (GNIS), “which sets the standard for official US maps”, the tech company said, and that it doesn’t have any impact on Canadian naming conventions or ​how the rest of the ‌world refers to the ‌lake.

Canada’s prime minister Mark Carney has flat-out rejected the renaming, explaining that Lake Ontario derives from an Indigenous Wendat word meaning “the lake is beautiful, the lake is great” that dates back more than 400 years.

With talks to resolve the trade dispute stalled, Trump issued an executive order on Thursday directing US agencies that the lake was now Lake America, much like an earlier dispute in his second presidency with Mexico, which saw Trump direct US agencies to refer to the Gulf of Mexico as the Gulf of America.

Meta has agreed to pay $US23 billion ($23.6 billion) and add child-safety measures to its Facebook and Instagram platforms to end a landmark trial over teen social media addiction and settle claims filed by 47 US states, state attorneys-general have announced.

The lawsuit accused Meta of contributing to the youth mental health crisis by deliberately designing features that addict children to its platforms and hiding them from the public. The head of Instagram, began his testimony late on Tuesday, local time, and defended Meta’s record and progress on child safety and privacy.

Under the proposed settlement, Meta agreed to adopt a series of safety features, including a “hard cap” on daily time limits and pauses for children using Instagram and Facebook. It will eliminate push notifications during weekday school hours and bring in “robust” age assurance measures and “age-appropriate” content controls to prevent bullying and harmful material about eating disorders and self-harm. There will also be stronger and more user-friendly parental controls and limits on social comparison features such as “like” counts.

The deal cuts short a trial that was expected to see chief executive Mark Zuckerberg take the stand in California, one of the 29 states to sue the tech giant. The agreement is worth $US353 million in Virginia alone and is one of the biggest in state consumer protection history, Attorney-General Jones said in a statement.

The settlement “will put an end to these dangerous practices and deliver meaningful relief that will protect children from online harm”. After reaching the settlement, Meta framed the deal as a template for the rest of the industry and pressed its competitors to match it.

More than 150 people have died and hundreds of tourists and hikers are missing after a flash flood hit the Tibet-Nepal border.

The flood happened on Wednesday morning, local time, killing at least 157 people in Nepal and three in Tibet, according to local authorities. China’s state broadcaster CCTV reported 265 were missing in the Tibet region’s Gyirong County near the border, while state news agency Xinhua reported significant casualties. Officials at Nepal’s tourism ministry told media outlets that more than 400 tourists were missing, of whom around 340 were foreigners.

Nepal tourism board officials said the flood hit near a popular route to Kailash Manasarovar in Tibet, a site visited annually at this time by hundreds of Hindu pilgrims, and near Langtang National Park, a popular hiking destination.

A Nepal tourism board spokesperson said 47 of the missing tourists were from the United States, 34 from Australia, 33 from Britain and 24 from Canada. The number of missing Australians is confirmed by Albanese on Thursday morning. They include one Australian who was travelling with Kathmandu Holiday Tours and Travel.

Albanese said the government was liaising with local authorities and tour operators to confirm the welfare of Australians in Nepal. In a statement on Thursday morning, Australia’s foreign minister Penny Wong said the loss of life and destruction caused by flash flooding in Nepal and China is devastating, and their thoughts are with the loved ones of those killed or missing and all affected by this disaster.

A joint statement about this incident is also issued by the embassies of Australia, Finland, France, Norway, Switzerland and the UK in Nepal.