See dozens of cars on their side after Iowa train derailment near Glidden. What we know.

A train with around three dozen cars derailed in Carroll County on Monday.

While derailments don't happen often, here's what you need to know.

Where is Glidden, Iowa, the site of a train derailment Monday?

The train derailed east of Glidden, Iowa, a town of around 1,000 in Carroll County, around 5 p.m. Monday, July 29. Glidden is about 60 miles west of Ames on U.S. Highway 30.

The derailment happened on the Union Pacific Railroad.

Clean-up is underway, according to a Facebook post from the city .

The post said all crossings were open as of 9:30 p.m. Monday.

How did the train derailment happen in Glidden, Iowa?

The incident is still under investigation, Union Pacific Railroad spokesperson Mike Jaixen told the Register in an email.

"Union Pacific crews are responding to the incident," he said.

Were there any injuries or fatalities from the Iowa train derailment?

No, there are no injuries associated with the incident.

How often do trains derail?

Derailments are unlikely, Jaixen said.

"A Union Pacific train can travel a distance equivalent to traversing around the earth around 49 times before a derailment," he said.

There have been four derailments in Iowa through April of this year. There were 31 in 2023, according to the Federal Railroad Administration.

Kyle Werner is a reporter for the Register. Reach him at kwerner@dmreg.com.

This article originally appeared on Des Moines Register: See dozens of cars on their side after Iowa train derailment near Glidden. What we know.