Because of the heavy rain expected Wednesday evening, the Howard County Police Department is closing Main Street of Historic Ellicott City — an area known for its historic flooding. Howard County City Government announced the decision in a post on Facebook,

The National Weather Service released a flood advisory at 6:49 p.m. on Wednesday in effect until 10 p.m. for Calhoun County.

HOUSTON — After a stormy Tuesday evening that brought isolated flooding and lightning across Southeast Texas, more rain and storms are expected to return on Wednesday, with widespread impacts likely during the afternoon commute.

The Orioles’ game against the Mets at Camden Yards on Wednesday has been postponed because of rain, leading to a Thursday doubleheader.

Thursday will be a “storm sandwich” with pockets of showers to heavy rain in the morning, a dry midday, and scattered afternoon showers and thunderstorms popping up across the region.

Radar data can estimate rainfall to a fairly accurate amount. The rain data in the case of the deadly tragedy that unfolded in the Texas Hill Country last weekend shows exactly why the area around Camp Mystic and the Guadalupe River, outside of San Antonio, had such a raging flash flood.

Heavy rains fell quickly in the predawn hours of Friday in the Texas Hill Country, causing the Guadalupe River to rise 26 feet in just 45 minutes.

Meanwhile, anguished parents waited for word on the 10 young campers still missing from Camp Mystic, which was hit hard by floodwaters.

On Wednesday at 10:35 p.m. a flood warning was released by the National Weather Service in effect until Thursday at 2:45 a.m. for Chester County.