NASCAR’s Xfinity Series race in Chicago won’t be continued Sunday due to weather, officials announced as the city remains under a flash flood warning. The Cup Series’ Grant Park 220 remains set to go at 4:05 p.m. CT.

Cole Custer won the earlier race, The Loop 121, by leading with 25 of 55 completed when a red flag was dropped Saturday due to lightning. NASCAR announced Sunday that those results were considered final.

“I was honestly shocked we didn’t wreck more cars.” Custer told NBC during the delay Saturday. “Hats off to the field so far.”

The calling of the Xfinity race Sunday came after hours of stalling in the hopes of getting it in before the marquee Grant Park 220. However, with rain hitting Chicago throughout the day and a flash flood warning in effect, crews were unable to get the downtown track into racing condition in time.

The related outdoor concerts set for Sunday, including Charley Crockett and Miranda Lambert, were also cancelled.

Earlier Sunday, NASCAR said it was in a “holding pattern” due to standing water on the course. The race was paused Saturday because of lightning.

The National Weather Service extended a flash flood warning for Cook County, which includes Chicago, and surrounding areas until 6:30 p.m. CT

In an emergency push alert, NWS warned:

“This is a dangerous and life-threatening situation. Do not attempt to travel unless you are fleeing an area subject to flooding or under an evacuation order.”