Typhoons have also hit U.S. territories, causing billions of dollars in devastating damage to places like Guam, which was battered by Super Typhoon Mawar in May 2023. Most typhoons scrape or strike places like the Philippines, Japan and Taiwan; they can also hit the Korean Peninsula, China and Vietnam, bringing damaging winds and storm surges.

A tropical storm is intensifying and is expected to reach typhoon strength before hitting southern China's coast on Sunday

Showers are forecast for eastern Taiwan, the Hengchun Peninsula, and the south, with localized heavy rain in Hualien, Taitung, and Hengchun. Yilan and Greater Taipei may see brief rain, while Taoyuan to Tainan could experience afternoon thunderstorms.

Satellite imagery can help determine the strength, size and cohesion of a storm. The stronger a storm becomes, the more likely an eye will form in the center. When the eye looks symmetrical, that often means the storm is not encountering anything to weaken it.