Passengers are arriving in Chicago after hundreds of travelers spent the night on board three snowbound Amtrak trains stuck on the tracks in Illinois.

Amtrak spokesman Marc Magliari says the first busload of passengers arrived at Chicago's Union Station Tuesday morning. More were expected throughout the morning.

About 500 passengers were stranded overnight near Mendota and Galesburg after their trains got stuck in blowing and drifting snow and ice.

Two trains were heading to Chicago from California, while the third was from Quincy.

Several passengers speaking to news outlets by cellphone said conditions on the trains deteriorated and that they went long periods without food.

But Magliari says all trains had working bathrooms and no medical problems were reported. He said food was also brought to passengers.

Charley Gallay, Getty Images