COLUMBIA, Mo. -

Health official's are warning everyone to plan for heat at Mizzou's first football game Saturday. They said with temperatures expected to be in the 90's all day, people can start to feel the effects of heat illnesses within minutes.

Officials said heat, not security, is their biggest worry. With temperatures expected to still be in the mid-90s by kickoff, doctors said people are at risk of getting heat illness if they're not careful.

“If you start feeling lightheaded, you start feeling nauseated, you don't feel well, make sure somebody goes with you to somewhere where you have some good air flow and where it's a little cooler,” Providence Urgent Care's Dr. Scott Schultz said.

Schultz said even though it's later in summer, many are not accustomed to the hot weather. He says the elderly and young are most susceptible to dehydration or heat stroke.

ABC 17 News did tests on their own of the bleachers in the stadium. Seats were coming in at 160 degrees. It took about eight minutes before the first signs of heat illness set in.

“We'll be looking for people that may be having medical issues and getting them out of the area to get them some air and make sure they're drinking enough water,” University of Missouri Capt. Brian Weimer said.

Doctors said it's important that fans pay attention to the signs and get cool before it turns into a bigger issue. Otherwise you most likely will pass out and be sent to the hospital.

Doctors said if you're drinking alcohol, then the best thing you can do is drink water or sports drinks in between. Remember you are allowed to bring in one sealed bottle of water. There are no size specifications for that either.