A Burger King sign in Lincoln, Nebraska, has gone viral reading, “WE ALL QUIT” and “SORRY FOR THE INCONVENIENCE.”

Employees there said they’ve been working in a kitchen with no air conditioning for weeks, with the temperature reaching more than 90 degrees at one point.

One employee, former general manager Rachael Flores, was reportedly hospitalized for dehydration.

“I didn’t think anybody was going to notice it [the sign], because we did just one sign and then it went pretty crazy on Facebook. I got a call from my upper management and they told me I needed to take it down,” Flores said.

Flores had reportedly been working at the fast-food chain since January and put in her two weeks notice this month, saying she’d often worked up to 60 hours per week. Eight of her co-workers followed her lead, voicing complaints of an understaffed restaurant.

The fast food location is reportedly still open but, according to Flores, remains understaffed.