Since the East Palestine derailment, legislators and railroad leaders have emphasized the need for more hazmat training among local emergency responders

The company told the U.S. Senate it will establish a fund for homes within a five-mile radius of the February derailment in East Palestine to pay for declines in property values after the spill.

Norfolk Southern said it expects February's fiery Ohio derailment to cost it $387 million, but that total will likely increase over time and that doesn't reflect how much the railroad's insurance companies will eventually cover

Residents of East Palestine, Ohio, say they're still living in limbo almost three months after a fiery Norfolk Southern train derailment blackened the skies and sent residents fleeing

Members of a CDC team are experiencing symptoms after investigating the East Palestine train derailment, raising new questions about air quality.

The CDC said multiple investigators in East Palestine, Ohio, fell ill while studying possible health impacts from the train derailment last month.

Members of a CDC investigative team studying the health effects of the Ohio train derailment briefly became ill with symptoms including headache and nausea.

The lawsuit is seeking relief and monetary penalties for each day it violated clean water laws in East Palestine, Ohio.

The DOJ is seeking fines for alleged violations of the Clean Water Act from Norfolk Southern in the East Palestine, Ohio derailment.

Rail safety measures proposed after the East Palestine train derailment are closer to becoming law in Ohio

Pennsylvania's Blackhawk School District sued Norfolk Southern over the East Palestine train derailment, alleging negligence.

Railroad Norfolk Southern is backing away from its push to reduce its train crews down to one person

East Palestine, Ohio, resident Misti Allison testified to the U.S. Senate Committee on Commerce, Science and Transportation about the toxic train derailment

Not long after the Ohio train derailment, pro-Russian voices on Twitter began spreading anti-U.S. propaganda about the incident

Sen. Bob Casey’s bill, set to be introduced Thursday, would create a new fund which would be used to reimburse emergency responders

Eight freight rail cars carrying corn syrup derailed near Topock, Arizona on Wednesday evening, according to BNSF Railway, not hazardous materials.

Ohio Attorney General Dave Yost said the state filed a lawsuit Tuesday against Norfolk Southern over last month's toxic train derailment in East Palestine.

Ohio Attorney General Dave Yost said the state filed a lawsuit Tuesday against Norfolk Southern over last month's toxic train derailment in East Palestine.

Here's a look at what's unfolded so far since a freight train carrying hazardous materials derailed on Feb. 3 near East Palestine, Ohio.

The head of the National Transportation Safety Board criticized embattled train operator Norfolk Southern's new safety goals amid a series of train derailments in recent weeks.

ABC News’ Martha Raddatz interviews National Transportation Safety Board Chair Jennifer Homendy on “This Week.”

Headaches, congestion, itchy skin rashes — and fear

The Association of American Railroads said defective wheels were involved in the Norfolk Southern train crash in Springfield, Ohio, on Sunday.

Shaw declined to directly answer what Norfolk Southern would specifically do for affected families in Thursday's congressional testimony.

A series of rail cars that Norfolk Southern recently put into service have been discovered to have defective, loose wheels.

Norfolk Southern CEO Alan Smith is slated to testify Thursday before a Senate Committee in Washington in the wake of the toxic train derailment in East Palestine, Ohio.

Alan Shaw testified before lawmakers on Capitol Hill and told East Palestine, Ohio residents he was deeply sorry for the derailment.

ABC News’ Jay O’Brien reports on Capitol Hill testimony from Norfolk Southern’s CEO following multiple train derailments and provides updates on Sen. Mitch McConnell's health.

CEO Alan Shaw apologized to residents of East Palestine, Ohio, and promised to "make this right."

ABC News’ Jay O’Brien and Gio Benitez report on Norfolk Southern CEO's Capitol Hill testimony and former NTSB chief Jim Hall breaks down why the nation’s rail system is facing problems.

Norfolk Southern Railway CEO Alan Shaw testifies before Congress on recent rail derailments.

The investigation comes as the CEO testifies before Congress about other derailments in February.

As Norfolk Southern CEO Alan Shaw is set to testify before Congress, officials are looking into the company’s handling of a separate incident on Feb. 27.

Federal regulators are looking into Norfolk Southern's handling of an additional reported hazmat concern, just weeks after the derailment in East Palestine, Ohio.

U.S. safety investigators released a preliminary report into the derailment of a Norfolk Southern train carrying toxic chemicals in East Palestine, Ohio.

NTSB investigators are on the ground of another Norfolk Southern derailment in Ohio that took place over the weekend.

Four of the 28 cars of a Norfolk Southern train that derailed Saturday near Springfield, Ohio, were empty at the time of the accident, according to officials.

ABC News’ Alex Presha reports from Springfield, Ohio, after a Norfolk Southern train derailed there. It marks the second time one of the freight carrier’s trains has derailed in the state in a month.

Ohio Sen. Sherrod Brown speaks with "GMA3" after another Norfolk Southern train derails in Ohio one month after the first derailment caused a toxic chemical spill in East Palestine.

Officials from Ohio and Norfolk Southern deliver remarks on another train derailment, the second such incident in just over a month.

This comes after Norfolk Southern has announced it is removing 2,000 feet of tracks in East Palestine, Ohio, to remove contaminated soil from the February derailment.

The announcement came as the Atlanta-based rail operator faced scathing criticism and scrutiny.

No hazardous materials were involved after a Norfolk Southern train derailed Saturday near Springfield, Ohio, officials said, the second such incident in just over a month.

Norfolk Southern is facing more scrutiny over safety after another freight train derailed over the weekend. ABC News’ Liz Nagy has details.

Authorities in Ohio say there is no indication of any risk to public health from the derailment of a Norfolk Southern cargo train between Dayton and Columbus, the second derailment of a company train in the state in a month

Twenty-eight cars from a massive 212 car train derailed, including four empty tankers with residual amounts of diesel exhaust fluid and common industrial products.

Pete Buttigieg is firing back at Republican critics of his response to the train derailment in East Palestine, Ohio, in a new interview

Bad smells from the toxic train derailment in East Palestine, Ohio, may be causing health issues.

Sherrod Brown touted the need for new bipartisan rail safety legislation weeks after the train derailment in East Palestine sparked an uproar.

Former President Donald Trump on Wednesday toured the Ohio town near a toxic rain derailment three weeks ago.