Two tropical cyclones on opposite sides of the globe strengthened on Saturday, prompting governments and businesses to brace for possible disruptions in Taiwan and along the U.S. East Coast. In the western Pacific, the Japan Meteorological Agency upgraded Danas to the season’s first typhoon after sustained winds near its center reached about 20 metres per second. Taiwan’s Central Weather Administration said the storm was moving slowly north-northeast in the Taiwan Strait and is expected to pass closest to the island on Sunday, bringing heavy rain to eastern and southern regions. The agency plans to issue land warnings Saturday night, and several airlines have cancelled or rescheduled Sunday flights as a precaution. Across the Atlantic, the National Hurricane Center reported Tropical Storm Chantal’s winds at 40 mph, with forecasters expecting a brief increase to around 45–50 mph before an early-Sunday approach to the Carolinas. Meteorologists warned that the lopsided system could deliver heavy rainbands, localized flooding, dangerous rip currents and rough seas well east of its center as it nears the shoreline.