Record amounts of rainfall pounded eastern Nebraska overnight Wednesday, causing flash floods that trapped and swept away cars caught in the deluge.

The National Weather Service in Omaha reported that Lincoln, Nebraska, saw over 6 inches of rainfall Wednesday. weather.com digital meteorologist Rob Shackelford said the city broke its all-time wettest single day record, which was previously 5.45 inches set on Aug. 29, 1910.

(MORE: New Mexico flooding pushes dam to the brink, forcing evacuations)

Water rescues overnight

Local reports said there were multiple rescues by boat overnight, and a Lincoln Fire and Rescue spokesperson told KLKN-TV that at least one person was trapped in their vehicle around 11:30 p.m. local time.

Officials with Lincoln-Lancaster Emergency Management said emergency services were being stretched thin, and they asked people to stay off the roads overnight.

(WATCH: Helicopter rescues man atop overturned truck in Arizona flash flood)

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With the rain persisting Thursday, flood rescues continued as the sun came up. Authorities asked residents to use extreme caution during their morning commutes.

About 1,000 homes and businesses were also without power, according to PowerOutage.us.

The city of Bellevue shared photos of roads shut down by high water and debris in front of a medical center. Crews were out assessing the damage and working to clear and re-open roadways.

Historic rainfall

It's not confirmed yet, but should all of the rainfall be attributed to Polo's remnants, this also could end up being the highest rainfall total from a tropical cyclone for the state of Nebraska, according to this map posted from NOAA.

This would be the second state to set a new tropical cyclone rainfall record in 2026 — Arthur set a new record for Louisiana when 37.58 inches fell in one area in June.