At least one Indianapolis 500 record appears likely to be set on Sunday, as the National Weather Service has issued a heat advisory counseling people in the vicinity of the Indianapolis Motor Speedway that record-breaking heat is possible.

The advisory will be in effect until Sunday at 7 p.m. CDT (8 p.m. EDT). The service anticipates heat-index values in the area of 100 degrees Fahrenheit during the afternoon, when the Indy 500 will be under way.

The hottest temperature in the race's history was the 92 degrees recorded in 1937.

It's going to be hot, and actually the most important thing is that it's going to be humid, and humidity is a bigger factor than the actual absolute temperature as far as heat-related illnesses, said Dr. Geoffrey Billows, medical director of the Indianapolis Motor Speedway.

As a result, people within the area covered by the heat advisory have been advised to take precautions to avoid heat-related illnesses.

These precautions include but are not limited to the following, which were suggested by the speedway's medical staff:

-- Drink plenty of water regardless of activity level.

-- Limit intake of beverages containing alcohol or caffeine.

-- Wear light-colored, loose-fitting clothing.

-- Wear a wide-brimmed hat.

-- Wear sunglasses.

-- Take shade breaks.

-- Apply sunscreen regularly.

The 96th Indianapolis 500 will be live-streamed on the speedway's online site beginning at 10:30 a.m. CDT (11:30 a.m. EDT), 30 minutes before the race's start.

The event also will be telecast by the ABC network, with prerace coverage commencing at 10 a.m. CDT (11 a.m. EDT).