The 10 most important things in the world right now

People take photos as a woman tests out a new iPhone X during a media event at Apple’s new headquarters in Cupertino, California on September 12, 2017. Photo: Josh Edelson/ AFP/ Getty Images.

Hello! Here’s what you need to know on Wednesday.

1. Hurricane Irma broke a bunch of meteorological records, including spending more time as a Category 5 hurricane than any other storm since records began in 1966. An army of Hollywood stars teamed up for a huge Hurricane Harvey and Irma relief fundraiser, along with all five living former presidents.

2. North Korea remains defiant over new sanctions imposed following its latest nuclear test. The hermit state has since vowed to redouble efforts to fight off what it said was the threat of a US invasion.

3. South Korea confirmed traces of radioactive gas from North Korea’s nuclear test. The South says it detected radioactive xenon gas following the North’s test earlier this month, although it was unable to conclude whether the test was of a hydrogen bomb, as Pyongyang claimed.

4. Young people fear for their futures in a post-Brexit Britain, according to a study by cross-party think tank Demos, for the British Council. Respondents said they feel “overburdened” by responsibility and “multiple barriers”, and many said they were still “angry and emotional” about last year’s vote to leave the EU.

5.The famed Sagrada Familia cathedral in Barcelona was evacuated in an “anti-terror” operation. A bomb squad was sent to check a van parked next to the church, but police later said it was a false alarm. Last month, a series of attacks around Barcelona killed 16 people.

6. Protests have taken place in cities across France against changes to the country’s labour laws, proposed by president Emmanuel Macron. An estimated 223,000 protesters took part. Under the new laws, companies gain more flexibility in negotiating wages and conditions directly with employees.

7. Facebook says some Russian ads during the US election promoted live events, indicating that alleged meddling ahead of the 2016 election went beyond social media. Meanwhile, a document provided to the State Department by a Russian diplomat in April outlined a broad, ambitious plan to overhaul Moscow’s relationship with Washington on the heels of Russia’s campaign to undermine confidence in the US presidential election and help elect Donald Trump.

8. China, Russia, and the US are in an artificial-intelligence arms race. Each nation has formally recognised the critical importance of intelligent machines to the future of their national security, and each sees AI-related technologies such as autonomous drones and intelligence processing software as tools for augmenting human soldier capital.

9. Smog could cut life expectancy by three years in northern China. The report found pollution levels were 46% higher north of the Huai River, a dividing line between northern and southern China. Coal-fired boilers are more widely used in colder northern China, partly due to government policies that provided free coal to households.

10. Myanmar’s de facto leader will miss next week’s UN General Assembly. Aung San Suu Kyi is facing allegations from supporters in the West that she failed in her handling of the Rohingya crisis, which has seen some 370,000 Rohingya Muslims flee the country.

And finally…

Here’s everything Apple announced at its big iPhone launch event

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