World News: Waltz out as U.S. national security adviser and tapped for UN ambassador

This is the World Now, bringing you the latest stories from around the globe.

U.S. President Donald Trump has removed National Security Adviser Mike Waltz following a security breach and named Secretary of State Marco Rubio his interim replacement. As part of the reshuffle, Trump has nominated Waltz as U.S. Ambassador to the United Nations.

President Trump's decision was announced on Thursday local time.

This comes after Waltz mistakenly added journalist Jeffrey Goldberg to a group chat of top officials discussing classified U.S. military operations in Yemen.

While an internal review concluded the breach was accidental, the incident intensified tensions between Waltz and other officials over his hawkish foreign policy views.

Secretary of State Marco Rubio has been appointed as acting National Security Adviser, adding to his current roles as Secretary of State, acting administrator for the United States Agency for International Development, and U.S. Archivist.

The Senate must now confirm Waltz's nomination as UN Ambassador.

Parts of Northwest Europe are experiencing an unprecedented heatwave, with multiple countries recording their highest temperatures at the start of May.

The United Kingdom saw its hottest start to May since records began on Thursday, with temperatures reaching 29.3 degrees Celsius at Kew Gardens in London, according to the Met Office. This surpasses the previous record of 27.4 degrees Celsius set in 1990.

Elsewhere in Europe, cities including Paris and Berlin have also experienced unseasonably warm weather, with temperatures reaching 29 and 27 degrees Celsius, respectively.

The early onset of such high temperatures raises concerns about the frequency and intensity of future heatwaves in the region.

In Brazil, Sister Inah Canabarro Lucas, recognized as the world's oldest person, has died at the age of 116.

Sister Inah passed away on April 30 in Porto Alegre due to natural causes.

Born in 1908, Lucas became a Catholic nun in her early 20s and devoted her life to religious service and teaching.

She joined the Teresian Sisters religious community in 1927 and spent decades educating students.

Sister Inah was blessed by the late Pope Francis in 2018.

She attributed her longevity to her faith, saying that "He is the secret of life."

With her passing, 115-year-old Ethel Caterham in England now holds the title of oldest living person.

Choi Chi-hee, Arirang News.