倒灌dàoguàn河水、海水等因潮汐、台风等原因由低处流向高处{(of river or sea water, etc.) flow from a lower to a higher place due to the morning and evening tides, typhoon, etc.}: 海水～{The sea water is flowing up towards the highlands.}|江水～市区。{The river water is flooding the urban areas.}