What do you call dangerous amounts of precipitation?

After a summer of the hottest, driest weather on record, the rain returned.

“Good for the crops,” “No more hosepipe bans,” ran the headlines.

But the rain didn’t stop, it intensified. It surpassed torrential. It became vertical rivers. Water levels rose everywhere, devastating buildings, roads and farmland.

People were afraid. To venture outside was to drown, to remain indoors, starve.

Eventually the rain subsided, but that inundation was forever known as The Rain of Terror.

My entry in the August 2022 75 Word Story Challenge at SFFChronicles
Theme: Water
Genre: Speculative Fiction