We’ve been getting a lot of rain and one Japanese news article I found indicated that over 200,000 (everyone in Uki-shi and some areas of Yamato-machi) people have been told to evacuate:
“活発な前線の影響で激しい雨に見舞われている熊本県では１１日午前、宇城市全域や山都町の一部などで計約２万８０００世帯約７万４０００人に避難勧告が出された。これまでの分と合わせ、同県内では２０万人超の住民に避難勧告が出ている。”
http://www.sankei.com/affairs/news/150611/afr1506110010-n1.html
Here’s a link to several live cameras in the Kumamoto area. The image you see is one from a camera pointed at the Shirakawa River, near downtown Kumamoto.