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SPEEDWAY, Ind– Race fans are already in town for Carb Day and the 100th running of the Indy 500 this Sunday. However, until then, all eyes are on the weather radar.

The amount of race fans that flock to the speedway this weekend is expected to break record numbers and Indianapolis Motor Speedway officials are planning for anything.

“The biggest issue for us making sure internally we are ready to communicate the right message to our fans and making sure we deliver it in a way they can understand,” said IMS president Doug Boles.

Although the rain fell Thursday afternoon and halted racetrack activity, it will be a much different story when roughly 400,000 people fill the area.

From a fan standpoint, we will do the best we can to give you information from which to make a decision,” said Boles.

“You hope for a nice sunny day because you want to see them run.  But the weather is out of our control,” said race fan Jim Hord.

“I will sit in the rain until they say we are not racing anymore,” said race fan David Zipf.

IMS leaders urge fans to pay attention to the PA and monitors throughout the track.  You can also follow the official IMS social media accounts.