The typhoon In-fa is descending on the islands of southern Japan and targeting eastern China by next week. The storm could bring extremely heavy rainfall to millions of people in China and Taiwan. And behind In-fa, there is a tropical threat to northern and central Japan, which could potentially impact the Olympics by early next week. Typhoon In-fa slam southern Japan Typhoon In-fa is currently located about 190 miles (305 kilometers) from Okinawa and is starting to moveacer to the northwest. Maximum winds for the storm are 100 mph (160 km / h), as of the 11 a.m. ET update from the Joint Typhoon Warning Center (JTWC). In-fa had slight weakness mid-week due to dry air, weakening his thunderstorms, as well as slightly cooler sea surface temperatures. Read more The good news is that no significant strengthening of this storm is expected because of this; but it is still an equivalent Category 2 hurricane affecting the lands of the Northwest Pacific Ocean. In-fa will continue to follow slowly in a general northwesterly direction until Friday local time with maximum winds of around 100 mph (160 to 165 km / h) while impacting Okinawa and other parts islands in southern Japan.In addition to strong winds, there will continue to be heavy rains. The area in and near Miyakojima, Japan, will be dans the mile of heavy rain, with over 20 inches (over 500 millimeters) of additional precipitation forecast.