NASA said it was scrapping Tuesday's plans to launch Artemis, the US return to the moon after five decades, noting concerns about a tropical storm headed to Florida.
Tropical Storm Ian is expected to hit Florida, home to the Kennedy Space Center, next week, according to the US National Hurricane Center.
Apart from weather and technical challenges like a fuel leak, Artemis I, the uncrewed test flight, signals a major turning point for NASA's post-Apollo human spaceflight programme, after decades focused on low-Earth orbit with space shuttles and the International Space Station.
Artemis will be headed to the moon, as a stepping stone for a future flight to Mars.
Named for the goddess who was Apollo's twin sister in ancient Greek mythology, Artemis aims to return astronauts to the moon's surface as early as 2025, though many experts believe that time frame will likely slip.
North Korea fired a short-range ballistic missile on Thursday towards the sea off the peninsula's eastern coast, South Korea's military said, the first such launch in more than 40 days after a series of weapons tests earlier this year.
A wildfire prompted an evacuation alert on Wednesday about 30 km (18.64 miles) from Vancouver, one of Canada's largest metropolitan areas, as blazes in Western Canada continued to spread due to dry and hot weather.
Israel said two of its soldiers were killed in southern Lebanon on Wednesday while Lebanese authorities said Israeli retaliatory attacks killed at least one person, a flare-up in violence that coincided with the latest round of talks between the two countries.
Italy took the unprecedented step of placing all its major cities on the highest level of health alert due to high temperatures on Thursday while Hungary turned off the lights at some of its best-known buildings to save energy as a heatwave maintained its grip on large parts of Europe.
Rescuers worked on Thursday to douse fires and clear debris in Ukraine's eastern city of Balakliia after Russian strikes on homes killed three overnight, authorities said on the Telegram messaging app.