A New Jersey woman died earlier this week trying to catch a few hours of sleep between jobs, a chilling reminder of the struggle low-wage workers, particularly women, face making ends meet.

Police found Maria Fernandes dead in her car on Monday night, parked in a convenience-store parking lot in Elizabeth, N.J., according to a police press release. Fernandes, 32, was wearing a Dunkin’ Donuts uniform when she was found. A friend and fellow employees told officials she worked as many as four jobs, said Lt. Daniel Saulnier, a spokesman for the Elizabeth police department.

Authorities are waiting on a toxicology report to determine the exact cause of death, but Hazmat investigators found that fumes in Fernandes’ car were caused by a gasoline can that had spilled in the back, according to the release. Friends told police that Fernandes kept gas in her car to avoid running out of gas when traveling between jobs. And she often slept in parking lots to get a few hours of rest between jobs, authorities said.

“It is a very sad story and really tragic, and it shines a light on what is a real problem, particularly for low-wage workers, today,” said Elizabeth Watson, senior counsel and director of workplace justice for women at the National Women’s Law Center.