The Maryland flood that was caused by a 1-in-1,000-year rain event

This Day In Weather History is a daily podcast by Chris Mei from The Weather Network, featuring stories about people, communities and events and how weather impacted them.

--

On Saturday, July 30, 2016, 165 mm of rain fell on Ellicott City, Md., in around three hours. That's almost double the city's monthly average.

According to the National Center for Environmental Information, statistically, that's a 1-in-1,000-year rain event.

"Governor Larry Hogan Tours Old Ellicott City by Anthony DePanise at Main Street, Ellicott City, Md." Courtesy of Maryland GovPics/Wikipedia/CC BY 2.0

The record levels of rain caused flash flooding, primarily affecting Main Street. The floods swept away cars and damaged homes and other buildings. Maryland's governor, Larry Hogan, declared a state of emergency for the area.

Businesses on Main Street closed for more than two months for flood restoration. The street was also closed to cars for roads and sidewalk repairs.

Two people died in the flash floods, Jessica Watsula, 35, and Joseph A. Blevins, 38. Both of them were in cars that were swept away by the rushing waters.

"Governor Larry Hogan and Howard County Executive Allan H. Kittleman in Ellicott City shortly after the flood." Courtesy of Maryland GovPics/Wikipedia/CC BY 2.0

Marshall Shepherd, a University of Georgia meteorologist, said that stormwater management systems are out of date in the area. He also mentioned that impervious urbanized surfaces, like asphalt and concrete, cause water to run off into streams, lakes, and rivers.

To learn more about the 2016 Maryland flood, listen to today's episode of "This Day In Weather History."

Subscribe to 'This Day in Weather History': Apple Podcasts | Amazon Alexa | Google Assistant | Spotify | Google Podcasts | iHeartRadio | Overcast'