OKLAHOMA - It's now day five of scorching temperatures.
We've been under a heat alert since Tuesday.
So far, 29 people have been victims of the dangerous heat, five of them today alone.
Friday morning emergency crews were called after a postal worker collapsed on a route he works every day.
There is no escaping the sun while delivering mail.
Many people don't realize the conditions they work through because mail carriers make it look easy.
But this past week's temperatures were different.
Matthew Vaughn has tried to keep an eye out on them, bringing them bottles of water in the heat of the afternoon.
“Pretty much any mailman that comes through has just been sweating up a storm,” says Vaughn.
He works outside as well but he now knows firsthand exactly what that Oklahoma sun can do to you if you aren't careful.
From Friday morning’s 911 call:
EMSA: “The ambulance is on the way tell me exactly what happened.”
Matthew Vaughn: “We had a mailman parked in front of my house and he just passed out and collapsed to the ground. I think he’s had a heat stroke.”
He and a friend came to Cory Dennis' rescue.
Dennis knew this week was going to be a hot one so he made sure to stay hydrated. He took all of the proper precautions, but his preparation was no match for the Oklahoma sun.
Dennis felt fine Friday morning, delivering mail as usual. But when he started on this street it hit him. He was tired, dizzy and had stomach cramps.
“That’s when I thought I just need to get back to my truck and just cool off a little bit and get some fluids in me,” says Dennis.
But he didn't make it.
“I just remember the next thing I knew I was on the ground,” says Dennis. “It’s a helpless feeling. It’s very scary.”
Dennis is pretty healthy and had everything he needed to stay hydrated. It was so hot and he was sweating so much, he just couldn't replace his fluids fast enough.
He now wants everyone to take this heat seriously.
“It’s not a joke at all,” says Dennis. “Don’t be out there if you don’t have to. Being a mail carrier we have to be out there. That’s our job we have to do it. So we have to protect ourselves as much as we can. Drink water!”
If you have to be out in the heat, EMSA suggests you wear light colored clothing, take frequent breaks and drink plenty of water.