cnn
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Roadways at Detroit Metropolitan Wayne County Airport have reopened after overnight flooding partially blocked a terminal and thunderstorms halted incoming flights on Thursday.
Access to the McNamara terminal has been restored, airport authorities said Thursday afternoon.
According to an airport spokesperson, the northbound and southbound tunnels at Dingell Drive have reopened. However, the Federal Aviation Administration said the airport is still experiencing ground delays as a result of the earlier ground stop.
Three inches of rain fell on the airport for about five hours, according to the National Weather Service, causing some flooding. In particular, travelers were unable to access the McNamara terminal at the airport due to flooding in the Dingell Drive tunnels, the airport previously said.
“Some roads at Detroit Metropolitan Wayne County Airport remain closed due to storms overnight.” the airport said earlier. “The large amount of rain in a short period of time is the main factor for flooding in DTW.”
About 18% of flights originating from the airport were canceled on Thursday, according to the Flight Aware tracking site. While the cancellations affect several airlines, Delta Air Lines has been hit particularly hard with 96 canceled flights.
Detroit Metropolitan Airport (DTW) is a major hub for both Delta and Spirit and has more than 1,100 flights per day, according to its website.
The rain is linked to a broader risk of severe storms and flooding in the Great Lakes area.
A Level 2 of 4 flood risk stretches from Ohio to Pennsylvania, and the severe storm threat includes more than 40 million people in the Great Lakes, including Chicago, Detroit and Cleveland, where stronger to severe storms are expected. .