Mississippi Thunder Speedway has one of its biggest nights of racing tonight with the fourth annual River City Rumble. There are larger cash payouts tonight for the winners, which will mean more cars taking to the track. There are fireworks after the races are over and then the Freezers will perform a live concert. A boys’ and girls’ bike will be given away along with five 32-inch flat screen televisions. The racing begins at 6:00 with the mini mods with the rest of the classes beginning at 7:00.