Ohio Faces Extreme Heat Emergency in June-24 with Temperatures Soaring Past 100°F

Extreme Temperatures and High Humidity Create Hazardous Conditions, Heat Index Could Reach 110°F

Ohio is facing an intense and potentially record-breaking heat wave in mid-June 2024, as a dangerous combination of high temperatures and oppressive humidity grips the Midwest and Northeast United States. The National Weather Service has issued excessive heat warnings, urging residents to take precautions as the heat index, a measure of how hot it really feels when relative humidity is factored with the actual air temperature, is expected to climb above 100°F and could reach as high as 110°F in some areas.

“We’re looking at a prolonged period of dangerously hot conditions across Ohio and surrounding states,” said meteorologist Amanda Freitag from the National Weather Service office in Cleveland. “Temperatures will soar into the upper 90s for several consecutive days, with little relief even at night. When you factor in the humidity, it will feel absolutely oppressive outside.”

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Expanding Heat Dome Fuels Extreme Temperatures

The culprit behind this intense heat wave is a massive heat dome, or ridge of high pressure, that will remain stationary over the northern United States for an extended period. Heat domes act like atmospheric lids, trapping hot air underneath and preventing cooler air and inclement weather from moving through.

Sinking air within these domes warms up and dries out as it descends, leading to clear skies that allow the sun to further bake the ground. Warm air expands, causing the atmosphere to literally bulge upwards in height.

Meteorologists measure the extent of this expansion by looking at the height of the 500 millibar pressure level halfway up through the atmosphere. Typically this level averages around 5600 meters or 18,000 feet in height. But forecast models are predicting heights may exceed 6000 meters or 19,685 feet over the Northeast, an unprecedented level that would shatter records.

“We’ve never seen the atmosphere expand vertically to this extent before,” explained Dr. Michael Ventrice, meteorological scientist at IBM. “This is an exceptional and extremely dangerous heat dome that will not only bring record temperatures, but also pose major health risks to vulnerable populations.”

Ohio Valley and Northeast Face Hottest Temperatures

While much of the eastern half of the nation will endure abnormally hot weather this week, the core of the heat wave will center over the Ohio Valley and Northeast regions. Temperatures are expected to peak in the upper 90s to near 100°F for three to five straight days in cities like Cleveland, Columbus, Cincinnati, Detroit, Pittsburgh, Philadelphia and New York City.

Overnight lows will struggle to drop below 80°F in urban areas, offering little chance for homes without air conditioning to cool off. Dew points, a measure of moisture in the air, will surge into the 70s, an oppressive level that will make it feel difficult to breathe outside.

The sultry combination of heat and humidity will send heat indices soaring over 100°F for several days in a row, and as high as 110°F in some locations. At this level, heat illnesses like heat exhaustion and heat stroke become much more likely, especially for those engaging in strenuous outdoor activities.

“The cumulative effect of enduring multiple extremely hot days and warm nights without relief is particularly dangerous,” noted Freitag. “Your body doesn’t have a chance to recover, especially if you lack access to air conditioning. Heat stress can rapidly escalate to heat exhaustion or even deadly heat stroke.”

Little Relief at Night as Lows Remain Elevated

Compounding the danger of this heat wave will be the lack of overnight cooling, as low temperatures remain well above average in the mid to upper 70s. Homes without air conditioning will stay very warm and muggy all night, preventing people from getting a break from the oppressive conditions.

Urban areas will be hit especially hard, as the “urban heat island” effect keeps cities several degrees warmer than surrounding rural areas. Asphalt, concrete, and brick surfaces absorb heat during the day and radiate it back at night.

“Those without access to air conditioning or cool public spaces are at the highest risk during these heat waves,” said Dr. Aaron Bernstein, interim director of the Center for Climate, Health, and the Global Environment at Harvard T.H. Chan School of Public Health. “Check on elderly neighbors, avoid outdoor activity, and head to cooling centers if your home is too hot.”

Dangerous Heat Indices and Heat Stress

The heat index, also known as the “feels like” or “apparent” temperature, is a measure of how hot it really feels outside when relative humidity is combined with the actual air temperature. It is a more accurate measure of heat stress on the human body than air temperature alone.

At heat indices above 103°F, heat stroke, heat cramps, and heat exhaustion are likely with prolonged exposure or strenuous activity. Young children, the elderly, and those with pre-existing health conditions are especially vulnerable.

“When it feels this hot and humid outside, your body has a much harder time cooling itself through sweating,” explained Dr. Sameed Khatana, assistant professor of medicine at the University of Pennsylvania. “Sweat doesn’t evaporate as readily in high humidity, so your core temperature can rise to dangerous levels if you don’t take breaks in the air conditioning.”

The National Weather Service advises limiting time outdoors, staying hydrated, wearing light-colored and loose-fitting clothing, and knowing the warning signs of heat illness during oppressive heat waves. If you experience heavy sweating, weakness, cold or clammy skin, nausea, or fainting, you may be suffering from heat exhaustion and should move to a cool place immediately.

Climate Change Fuels More Frequent and Intense Heat Waves

While heat waves are a regular occurrence during summer, climate change is making them more frequent, intense, and longer-lasting. As global temperatures rise due to increasing greenhouse gas emissions, the probability of extreme heat events climbs substantially.

“We’re seeing heat waves that would have been rare in a pre-industrial climate happening much more frequently now,” said Dr. Kristina Dahl, senior climate scientist at the Union of Concerned Scientists. “Climate change is loading the dice toward more record heat, and we’re seeing the consequences in real-time.”

A 2022 study found that the probability of record-shattering heat waves has increased by a factor of five due to climate change, and that they are now on average about 5°F hotter than they would have been in a pre-industrial climate.

The increasing intensity and frequency of heat waves has major implications for public health, especially for vulnerable populations like the elderly, low-income communities, and those with pre-existing health conditions. A 2021 study estimated that extreme heat contributes to the deaths of over 5 million people per year worldwide.

“Climate change is a public health emergency, and worsening heat waves are one of the clearest examples,” said Bernstein. “We need urgent action to reduce greenhouse gas emissions and protect communities from the dangers of extreme heat.”

Preparing for the Heat Wave

As the heat wave approaches, officials are urging residents to take precautions and check on vulnerable neighbors. Many cities have opened cooling centers for those without access to air conditioning, and utilities are preparing for spikes in electricity demand.

“We’re asking all of our customers to conserve energy as much as possible during the hottest parts of the day,” said a spokesperson for American Electric Power, one of Ohio’s largest utilities. “Set your thermostat a few degrees higher, avoid using large appliances, and turn off lights when you leave a room.”

Some outdoor events and activities may be canceled or rescheduled due to the dangerous heat. Construction crews, landscapers, and other outdoor workers will need to take frequent breaks and stay hydrated.

“Safety is our top priority,” said Mike Johnson, owner of a Columbus-based roofing company. “We’re starting work earlier in the day and telling our crews to take breaks in the shade or air conditioning every hour.”

Animal welfare organizations are also reminding pet owners to limit walks to the cooler parts of the day, provide plenty of water and shade, and never leave animals in parked cars, where temperatures can quickly turn deadly.

While it may be tempting to head to the pool or beach to beat the heat, experts caution that water temperatures are still dangerously cold in many areas due to the cooler than normal spring. Lake Erie’s water temperature is only in the mid-60s, which can quickly cause hypothermia.

“Limit your time in cold water, and always wear a life jacket,” advised the U.S. Coast Guard in a statement. “Cold water shock can incapacitate even the strongest swimmers.”

Severe Storms and Heavy Rain Also Possible

In addition to the heat, some parts of Ohio could also see severe thunderstorms this week as the heat dome collides with cooler air to the north. Damaging winds, large hail, and even isolated tornadoes are possible, especially on Wednesday and Thursday.

“We’ll be monitoring the potential for severe weather closely,” said Freitag. “Make sure you have multiple ways to receive warnings, and know what to do if a severe thunderstorm or tornado warning is issued for your area.”

Some storms could also produce very heavy rainfall, leading to localized flash flooding. Many areas of Ohio have seen above-average precipitation this spring, saturating the ground and making it more prone to flooding.

“Don’t drive through flooded roadways, and stay tuned to local media for the latest weather updates,” advised the Ohio Emergency Management Agency in a statement.


The upcoming heat wave is a stark reminder of the dangers posed by extreme weather in a changing climate. As global temperatures continue to rise, events like this are becoming more common and severe, putting strain on public health, infrastructure, and the economy.

While it’s important to take precautions and stay safe during the heat wave, it’s also critical to address the root causes of climate change and build more resilient communities. This includes transitioning to clean energy, investing in heat adaptation strategies like urban forestry and cool roofs, and strengthening social safety nets.

“Extreme heat is one of the deadliest weather hazards, but it doesn’t have to be,” said Bernstein. “By taking action to reduce emissions and protect the most vulnerable, we can save lives and create a more just and sustainable future for all.”

As Ohio braces for a week of oppressive heat, it’s a reminder that climate change is not a distant threat, but a reality that is already affecting our communities. By working together and taking bold action, we can build a safer and more resilient world for generations to come.


Hi there!I'm C.K. Gupta, the founder and head writer at With a passion for health and wellness, I created FitnTip to share practical, science-backed advice to help you achieve your fitness goals.Over the years, I've curated valuable information from trusted resources on topics like nutrition, exercise, weight loss, and overall well-being. My aim is to distill this knowledge into easy-to-understand tips and strategies you can implement in your daily life.Whether you're looking to get in shape, eat healthier, or simply feel your best, FitnTip is here to support and guide you. I believe that everyone has the potential to transform their health through sustainable lifestyle changes.When I'm not researching the latest health trends or writing for FitnTip, you can find me trying out new fitness routines, experimenting with nutritious recipes, and spending quality time with loved ones.I'm excited to have you join our community as we embark on this wellness journey together. Let's make positive, lasting changes and unlock a healthier, happier you!

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