With the heatwave set to hit the Midwest, Americans under heatwave warnings have been told to stay INSIDE –

A heatwave that hit the west coast and southwestern regions last weekend is moving east, and some experts are warning people to stay home and watch out for the health of others around them when they need to go outside.

More than 200 million Americans will experience temperatures of 90 F or higher later this week, and states like Illinois and Michigan are likely to hit the market in the triple digits.

These are dangerous situations, especially in some areas where not all homes have air conditioning. People may suffer from heat sores, heat stroke and other problems if they are overexposed this week.

Experts tell DailyMail.com that those with access to air conditioning should stay indoors and those without, seek a refrigeration center or seek help from a neighbor if possible.

Outdoor activities should also be moved into late hours, even cool nights, and workers should rest regularly and be constantly monitored for signs of heatstroke, they say.

About 140 cities will see record temperatures this week, and the heatwave is likely to spread to northern Michigan. According to reports, Iowa is also expected to suffer from temperatures around 100 F.

Many may not realize how hot it is until they experience it for themselves, with temperatures around 20 degrees higher than normal in some areas.

Dr. Projecting triple-digit temperatures this week, George Chiampas, professor of emergency medicine at Northwestern University’s Feinberg School of Medicine in Chicago, warned that many people underestimate the summer heat and suffer from it.

Dr. George Chiampas, professor of emergency medicine at Northwestern, warns that places like summer camps are often afflicted by heat-related illnesses this time of year.

Summer camps, sports and many more outdoor activities will continue this week despite the heat wave. Many people who work in construction and other strenuous jobs that require them to be outdoors are also at risk.

Chiampas warns that people who participate in these activities are often at higher risk for heat illness.

He defines heat sickness as a spectrum that gradually worsens as a person is exposed to it.

Dr. Brad Uren, an emergency medicine doctor at the University of Michigan in the Detroit area who is expected to be affected by the heat this week, explained the progression of symptoms.

First, a person may develop a heat rash where small red bumps begin to appear where they should be sweating. These are minor, but early signs of keeping warm.

Then the person will experience heat exhaustion, where his heart will begin to beat, feel nauseous, sweat profusely, and feel tired. At this point, the person should quickly move inside or seek shade to protect oneself from the heat.

Dr. Brad Uren, MD, an emergency medicine physician at the University of Michigan, explained that a person should see a doctor if they are hot enough to stop sweating.

Eventually, a person gets heat stroke. The lethal stage is reached when the internal body temperature is so high that it can no longer regulate itself.

Chiampas says this happens when a person’s core temperature reaches 104 F.

Blood flow is diverted from the brain, liver and kidneys to the skin to cool the skin. As a result, a person may become confused, quarrelsome, distraught, and even have seizures.

“You diverted blood through your vital organs because what you’re trying to do is draw blood to make your skin cooler,” Chiampas said.

Clocks say that a major sign that a person is suffering from heatstroke is when they stop sweating. He warns that between 20 and 60 percent of patients will die.

Those most at risk are the very old, over 65 and the very young, two years and older.

People with kidney, heart and obese disease are also at higher risk.

Uren explains that some medications used for depression can cause problems with a person’s internal thermoregulatory systems, putting them at greater risk even at high temperatures.

Another risk is high physical exertion, as the body naturally heats up when active, but struggles to dissipate that heat through sweat in hot, humid conditions.

To avoid this, people who need to be outside for extended periods of time to exercise should be constantly monitored.

For example, employees should rest more between work shots.

In parts of the Ohio Valley, south and Death Valley, temperatures rose as a heatwave stabilized in different parts of the country.

However, there are other important concerns as well. Some people do not have air conditioning in their homes, as this type of weather is not unique to the region.

“The elderly and perhaps children are more at risk on days when it’s very hot,” warns Uren for this group.

State and local leaders often open cooling centers to assist these people at these times, and both experts advise Americans in affected areas to seek shelter there.

Chiampas also made it clear that this month is no one’s time to save energy or save a few bucks on their energy bills. The air conditioner must be on to manage the heat in the house.

He also advises people to check with neighbors they fear may have limited access to refrigeration to make sure others in their community or apartment are doing well.

Pets and children, both of which are stimulating, should also not be left in the heat.

Large swaths of the Midwest are expected to be affected this week during summer’s biggest heatwave.

Chicago and Minneapolis will see temperatures in the high 90s by the middle of the week. Heat tips are valid until June 15 for Windy City.

Indiana is expected to see mid-1990s temperatures accompanied by storms on Monday, WISHTV reports.

The hottest day of the week in Hoosier state will be Tuesday with temperatures reaching 90°C. These temperatures will last until Friday, when they drop into the 1980s.

At least one utility has warned of power outages that could hit Indiana during the heatwave, WDRB reports

Neighboring Ohio will see temperatures in the 90s Tuesday through Thursday.

In Louisville, Kentucky, daytime temperatures are expected to rise above 90°C on Tuesday and drop to 80°C in the evening, with city high temperatures expected to remain at that level until they drop to 85°C next Saturday.

Tennessee’s are warned to expect temperatures that will feel like 100 years in the 1990s, thanks to Gulf of Mexico winds that add and create moisture to the region. These temperatures will last until Thursday.

Kansas will see moderate to 90-degree temperatures over the next few days, which will be around 100-105F due to humidity.

Also, St. A record will be set if Tuesday in St. Louis reaches 101F as expected, the previous record was 97F. Temperatures remain in the triple digits this week.

On the east coast, South Carolina will see temperatures ranging from 100F to 105F throughout the week.

Like North Carolina, Charlotte is expected to break the June temperature record set in 1958, when temperatures hit 97F.