The overflowing of water (e.g., a river) beyond its banks; a flood or inundation.
台風の影響で近くの川が氾濫し、町内に避難指示が出た。
Due to the typhoon, the nearby river overflowed and evacuation orders were issued for the town.
堤防の決壊で住宅地が氾濫し、多くの家が浸水した。
When the levee broke, the residential area was inundated and many houses were flooded.
気候変動の影響で大雨が増え、河川の氾濫が頻発している。
With climate change causing more heavy rain, river flooding has become frequent.
A surplus or overabundance (often undesirable) — an excessive spread or proliferation of items or information.
ネット上に誤情報が氾濫していて、真偽の見分けが難しい。
False information is flooding the internet, making it hard to discern truth from falsehood.
安価な輸入品の氾濫で地元の小売店が苦境に立たされている。
Local shops are struggling because cheap imported goods have flooded the market.
デマが氾濫すると社会的混乱を招くことがある。
When rumors proliferate, they can sometimes cause social unrest.