BOZEMAN, Mont. -

People working outside had to call it a day much earlier than usual after hot temperatures made it difficult to finish work. Landscaping company Quality Lawncare Service had to delay maintaining their clients' property for the safety of their employees.

Danny Guenther works for the company and says he would usually finish all the scheduled lawns, but today he had to call it quits early. Guenther told NBC Montana the weather was so hot on Wednesday, he became fatigued and could not finish his work.

"I tried to beat the heat. If you're out there in the heat, it's pretty hard on you, and you don't want to get heat exhaustion," said Guenther.

He told us a typical day would consist of cutting up to 28 lawns. Wednesday's schedule with the heat factor only allowed him to cut 17 lawns before calling it a day.  Guenther says on the sweltering, unbearable days, it is important to dress the part.

"Dress appropriate. I wear t-shirts and shorts. You don't want to wear jeans or anything like that," said Guenther.

He told us he kept tabs on his phone, checking the temperature all day. When he noticed how much it rose, and how tired he got, that is when he called off the workday.

"I checked my phone to see what the temperature was and asked, myself 'should I keep working?' The answer was, 'I should stop.'"

According to health officials at Bozeman Deaconess Hospital, Guenther made a smart move.

"If you continue to stay and exercise or work in those hot conditions, you're probably going to end up finding yourself more towards heat stroke, which is a much more severe condition," said emergency room coordinator Sam Miller.  

Medical officials told NBC Montana they have treated about four cases of heat exhaustion between the past few days. Two cases were from people working outside in the hot sun.

Doctors say heat exhaustion is the first stage to to heat stroke. They tell us if you experience severe headaches or fatigue to call your doctor.