Kirk here with some news about the heavy rain. The alert level for landslides is at the highest level in the Aso region.
https://www.jma.go.jp/bosai/#lang=en&area_type=offices&area_code=430000&pattern=rain_snow
By the way, if you’re confused about the distinction between “inundation” and “flood,” the government uses “flood” to refer to overflowing rivers while “inundation” refers to other kinds of flooding (e.g. intense rain that overwhelms drainage systems, etc). I’ve written to them to tell them that these English words don’t convey the meaning of the Japanese terms (shinsui and kouzui). To their credit, they wrote back but, unfortunately, chose to blow me off with nonsense about the need to observe scholarly trends. :(
At any rate, depending on your location it’s possible for things to get dangerous quickly so be careful.