flashflood
/ˈflæʃˌfloʊd/Definitions
1. noun
a sudden and violent flood of water, often caused by heavy rainfall or a dam failure, that flows rapidly and causes widespread damage or disruption
“The flashflood swept away several cars and homes in the neighborhood.”
2. noun
a rapid and intense flow of something, such as ideas or emotions
“The flashflood of creativity during the brainstorming session inspired several innovative solutions.”