Flash flood warnings were issued for multiple areas of the metro, including Independence, Raytown, and Blue Springs.

LOUISVILLE, Ky. (WAVE) - An ALERT DAY is in place this evening as clusters of thunderstorms move into the region. Some storms may produce strong gusty winds. Flash flooding remains the top concern, especially along the I-64 corridor through the overnight hours.

Significant rainfall from storms caused flash flooding in parts of Montgomery County, Maryland, located north of Washington, D.C., on Saturday, trapping many in buildings and cars.

HONOLULU (HawaiiNewsNow) - A flash flood warning has been extended until 11 a.m. for north Kauai as heavy rain from earlier this morning is causing flooding. The National Weather Service in Honolulu said the warning is in effect for the area including Hanalei, Princeville, Kapaa, North Fork Wailua Trail, Wailua Homestead and Wainiha.

More rain could be on the way, with an additional half an inch to an inch of rainfall expected in Kansas City.

Heavy rains and flash flooding in the northeast have caused two deaths in New Jersey. More rain is expected through mid-week for portions of the eastern and central U.S.

The heavy downpours wreaked havoc across the city with footage showing commuters overwhelmed by floodwaters in various subway stations.

The heavy rain that turned a river in Texas into a raging wall of water was fueled by unique atmospheric conditions, according to meteorologists and climate scientists.