City of Kerrville officials provided an update July 19 on the number of individuals still missing from the July 4 flood.

Many have decried Kerr County's lack of sirens on the Guadalupe River. Officials in counties that have the systems say they are well worth the money.

Read more After the devastating July 4 flood that happened in Kerr County, the Kerr County Flood Disaster Joint Information Center confirmed Saturday that only three people remain missing, according to the city of Kerrville.

On Friday, 17 million people are under flood alerts across the Gulf Coast and in the mid-Atlantic, and 19 million are under heat alerts across the mid-Atlantic, southern Florida and Mississippi Valley.

The National Weather Service released an updated flash flood warning at 6:15 a.m. on Thursday in effect until 9 a.m. The warning is for Clay, Jackson, Carroll, Lafayette and Ray counties.

Storm drains along Interstate 435, a beltway that encircles most of the Kansas City metropolitan area, were unable to keep up during the deluge, he said, causing the highway to flood. Most of the rescues from vehicles took place at the highway’s 23rd St. exit, he said.

Flooding caused delays on multiple New York City subway lines Monday as torrential rain pummeled the Tri-State Area.

On Thursday at 11:02 p.m. the National Weather Service issued an updated flood warning in effect until Saturday at 2:42 p.m. The warning is for Jackson, Lafayette and Ray counties.

Officials say the town’s geography makes it especially vulnerable to flash flooding. Ellicott City sits in a valley where multiple streams, including the Tiber Branch and Hudson Branch, flow into the Patapsco River.

Storms prompted flash flood warnings across the New York City metropolitan area Monday night, with photos showing severe flooding across the city and in parts of New York state and New Jersey.

Neighbors across Kansas City, Kansas, are dealing with flood damage, with homes near the rivers hit especially hard.