Much of the Mahoning Valley will be under a heat advisory starting Tuesday morning.

A heat advisory is in effect for the entire area through early Tuesday evening, with heat
index values expected between 100 and 105 degrees.

This could cause a host of problems for those who are young, the elderly and people with certain medical conditions.

Doctors warn that too much heat can bring on serious illness including heat stroke.

"With heat stroke, people become disoriented, people become confused, because their brain is overheated," Dr. Benjamin Brocker said, a primary care doctor with Mercy Health.

Heat stroke can be brought on by heat exhaustion. Symptoms to watch for include feeling tired, dizzy, lightheaded, heart racing and if you stop sweating.

People who have respiratory conditions are urged to listen to their bodies and limit heat exposure.

"If you're feeling light-headed, dizzy, feeling tired, you're feeling overheated, then it's probably a good idea to go back inside," Dr. Brocker said.

On average, adults need to take in at least one liter of water per day, but when it's hot outside Dr. Brocker says you need more.

Water or sports drinks are encouraged to help prevent dehydration.

"They say your body can tell if it's thirsty or if it needs water, because you'll be thirsty, but in little kids that don't know to tell you they're thirsty or older adults, they don't really pick up on those symptoms," he said.

He suggests elderly and parents of young children limit their exposure times. It's recommended children take sips of water every 15 to 30 minutes while playing or swimming outdoors.

Dr. Brocker says children ages 3 and under should not be outdoor more than an hour at a time when the higher temperatures set it.

He recommends taking at least 15 minute breaks indoors where children and families can cool off.