Hundreds rescued from overheated trains in Germany

At least 52 people needed medical treatment and about 1,000 people had to switch trains, the national railway system, Deutsche Bahn, said.

All three modern ICE trains — whose windows do not open — were headed west from Berlin on Saturday, Deutsche Bahn spokesman Juergen Kornmann said. While two lost their air conditioning fairly close to a station and could be emptied quickly, a third heated up some distance before reaching the city of Bielefeld.

Kornmann said eight people suffering from heat exhaustion needed to be hospitalized in Bielefeld and another 44 needed medical treatment.

"We regret that some passengers suffered from health problems and even had to be taken to the hospital," Deutsche Bahn manager Ulrich Homburg said in a written statement. "We are shocked and want to apologize."

Ninety-one rescue staff called to Bielefeld station had to treat people suffering from hyperventilation, vertigo, overheating, headaches, and other symptoms, the local fire fighters said in a press release.