Cars were trapped in flash flooding in the suburb of Lilydale, in Melbourne’s east, on Tuesday night. Picture: Lilydale SES.

A flash flood is a rapid rise of water along a stream or in a low-lying urban area, the weather service said. Flash flooding ...

“Heavy rainfall and flash flooding has hit the Lilydale area hard, with VIC SES Lilydale Unit volunteers receiving over 130 requests for assistance in the last hour,” it said on Tuesday night.

Lilydale business owner Alex Tsao said the water from the flash floods reached halfway up his legs after gushing into his shop. "Yesterday, the heavens opened up and turned my shop into a river ...

Flash flooding ranks among the top weather-related killers in the U.S. But what is it exactly, and how does it happen?

A flash-flood warning is issued when a flash flood is imminent or occurring, the Weather Service said. If you are in a flood-prone area during a flash-flood warning, move immediately to high ground.

Flash floods killed dozens across Texas Hill Country over the holiday weekend as torrential rains swept the region.

Flash flooding is weather’s No. 2 killer, claiming more lives than anything but heat, so it’s important to understand what causes it and how to stay safe.

If there’s a “flash flood watch,” according to the service, flooding is not guaranteed, but conditions are favorable enough for it to be possible, so be prepared to change your plans.

Flash floods often manifest as walls of water that can wash away most things in its path and carry debris; they can reach heights of 30 feet or more and trigger equally dangerous mudslides.

With the potential for once-in-a-lifetime rainfall and widespread impacts, historic flash flooding is increasingly likely across parts of the nation through Saturday, fueled by repeated rounds of s… ...