They Gathered to See 'Big Boy,' Were Felled by the Heat

A historic train drew a huge crowd in Pennsylvania on Thursday, but the extreme heat came with it. Officials in Berks County declared a mass-casualty incident after more than 100 people waiting to see "Big Boy," billed as the world's largest steam-powered locomotive, suffered heat-related problems at the Reading & Blue Mountain Railroad Outer Station in Muhlenberg Township, reports UPI, citing local media. Temperatures hit about 106 degrees Fahrenheit as the train's arrival was delayed for more than an hour.

Emergency calls began around 1:30pm local time. Forty-five people were taken to local hospitals, with one person who went into cardiac arrest revived before transport, authorities said. Children and older adults made up most of the patients. Big Boy ultimately passed through the station around 2:30pm en route to Philadelphia.

With Independence Day festivities looming, Muhlenberg Police Chief Randall Hoover cautioned that revelers should prep for continued heat, per NBC Philadelphia, which notes that some attendees at the Big Boy event had started showing up as early as 9am. "Heat is going to be an issue, stay hydrated," Hoover advises. The CDC notes that heat-related illnesses can run the gamut from heat rash and cramps to heat exhaustion and heat stroke, per ABC27.