Advisory in effect as a heat dome is expected to raise temps to triple digits across South, Midwest
A 'heat dome' is expected to increase temperatures and humidity levels throughout the South and parts of the Midwest this week and will eventually move over the Northeast by the weekend.
A heat dome is a high-pressure bubble in the upper levels of the atmosphere that traps hot air and sun radiation underneath it. The Climate Reality Project, a nonprofit focused on climate change advocacy and education, compares heat domes to putting a lid on a hot pot; the lid keeps the hot air from leaving the pot and keeps the contents of the pot hot for a longer time.
The National Weather Service (NWS) issued heat warnings and advisories for millions of residents throughout the South and Midwest early Monday morning. An 'Extreme Heat Watch' advisory alert, which warns 'dangerous heat is possible,' was issued for Illinois, Missouri and Iowa. An 'Extreme Heat Warning' alert, which warns 'dangerous heat is happening or about to happen,' was sent to Oklahoma, Tennessee, Mississippi and Kansas residents.
Heat advisories were also issued for the entire state of Florida, as the state's heat index is expected to hit 110 to 115 degrees under the heat dome. (The NWS 'heat index' is a calculator that estimates what outdoor temperatures feel like to the human body.) The weather service's Heat Risk map shows that most of the state faces a major heat risk, with extreme conditions throughout the southwestern coast.
Hotter and more humid temperatures are expected to spread across the Midwest starting on Tuesday, according to AccuWeather. By midweek, temperatures will hit or exceed 100 degrees in most of the South, Midwest and Great Lakes region. The high temperatures will be paired with 'oppressively muggy air,' AccuWeather reported, especially in the Mississippi and Ohio Valleys.
Areas throughout Texas, Arkansas and Louisiana will experience peak temperatures either close to 100 degrees or above, Jonathan Erdman, the senior meteorologist at Weather.com predicts, potentially bringing triple-digit temperatures to Dallas for the first time in 2025.
Several of the cities that will be affected by the heat dome, such as Kansas City, Mo., have not hit triple-digit temperatures in two years, AccuWeather senior meteorologist Chad Merrill reported, and may experience record-high temperatures.
Merrill also expects that many residents of these cities 'won't get relief' from nighttime temperatures, which are expected to 'range from the mid-70s to the low 80s.'
The heat and humidity will move into the Northeast by Friday, the Weather Channel reported, noting that temperatures will likely become cooler than normal before rising under the heat dome.
Temperatures in Washington, D.C., and Philadelphia could reach almost 100 degrees later this week, the Weather Channel said.
Northeast, Midwest also warned about severe thunderstorms
The Weather Prediction Center (WPC) at the National Oceanic and Atmospheric Administration (NOAA) issued a warning over the weekend for excessive rainfall in areas across the Ohio Valley on Monday.
'Flash flooding is anticipated tonight over Northeast MO and Central IL as storms containing 3-4'/hour rainfall rates develop this evening,' the WPC warned on social media on Sunday, issuing a 'Moderate Risk' warning. The Moderate Risk level means numerous flash floods are likely to occur.
The NWS forecast discussion from Monday morning warned that upcoming thunderstorms posed flash flood threats in the Southwest, Northwest, Midwest, Mid-South and Southeast. While it's rare to see precipitation happen within a heat dome, severe thunderstorms are likely to form around its edges, often called the 'ring of fire.'
"In the world of meteorology, the ring of fire deals with thunderstorms along the northern edges of strong upper-levels high,' AccuWeather meteorologist Bernie Rayno said. 'Oftentimes, this setup produces severe thunderstorms along the northern edges of the heat.'
How to stay safe in extreme heat
Extreme heat is the deadliest type of weather in the U.S., even more so than tornadoes, flooding or hurricanes, according to research by the NWS. Prolonged extreme heat, as is expected in the heat dome this week, is especially dangerous for people who do not have access to air-conditioning or who spend a lot of time outdoors.
If you live in a place that will be impacted by the heat dome, here's what to do to help protect yourself:
Stay indoors and cool for as long as you can. Here is a list of public places you can go to for free air-conditioning.
Stay hydrated. It's helpful to add electrolytes to your water to further protect yourself from dehydration.
If you need to go outside, protect your skin by wearing sunscreen with an SPF of 30 or higher, sun-protective clothing and UV-blocking sunglasses.
Understand and look out for symptoms of heat-related illness. These include heavy sweating, fatigue, dizziness, muscle cramps, nausea and headaches. If you are experiencing these symptoms, move to a cool area to rest and hydrate.
Solve the daily Crossword
Hashtags
Try Our AI Features
Explore what Daily8 AI can do for you:
Comments
No comments yet...
Related Articles
Yahoo
an hour ago
- Yahoo
Iraqis battle extreme heatwave with ice, mist and river dips
STORY: :: July 28, 2025 :: Iraqis seek relief in rivers and misting fans as an extreme heatwave grips the country :: Baghdad, Iraq :: The government declared a public holiday in several provinces in response :: Najaf, Iraq :: Basra, Iraq In Baghdad, residents jumped into the Tigris River to cool off while others gathered near roadside fans spraying water or bought cooled bottled water from vendors. 'There is a rise in the temperature, it's currently over than 50 degrees, it's hitting 52 degrees during this recent period,' said Mohammed Sadeq, a resident of Baghdad. 'What can one do? You head back home, there's no electricity, and it's so hot - it feels like you're burning. One goes out to work, you have to, we have families and responsibilities.' The United Nations puts Iraq among the most vulnerable countries to climate change globally, citing water scarcity, drought, and extreme temperatures.
Yahoo
an hour ago
- Yahoo
Flash flooding strands employees, submerges vehicles at Groveport golf course
Central Ohio Weather and Radar GROVEPORT, Ohio (WCMH) — Multiple people were stranded overnight at the Links at Groveport golf course after flash flooding late Saturday night submerged dozens of cars under water. A large system of thunderstorms that brought heavy rainfall to central Ohio prompted the National Weather Service to issue flash flood warnings. Groveport saw at least three inches of rain in a 24-hour period and the golf course bore the brunt of the storm. Dozens of vehicles were submerged in water at the parking lot as firefighters and medics were called to help employees wade through the water. Multiple employees were stranded overnight and received rides home. No injuries have been reported. Storm Team 4 central Ohio weather Groveport flooding A woman spoke with NBC4 after she came to the golf course to check on her son who was finishing up work. She said while the course is known to flood quickly, she has never seen it this bad before. 'I was shocked. I actually was like supposed to be off and I came down here and it was pouring down rain, so I sat in my car to wait it out a little bit and I wasn't even realizing when I was sitting in my car that it was flooding so bad and I looked out my window and I was like oh my god, I have to get out of my car,' said employee McKenna Lowe. Saturday's rain continues a 2025 filled with heavy rain and flood warnings for Ohio and the U.S. More than 15 inches of rain have fallen on Columbus since May 1 as of July 20, nearly five inches above normal, and double what fell during last year's drought (June-October). Some areas in southern Ohio had upwards of two feet of rain in the past three months, resulting in flooding. Through July 15, a record 3,045 flash flood warnings were issued by the National Weather Service across the U.S., exceeding the 1998 record for an entire year (3,033). Storm Team 4 is forecasting another wet day on Sunday with much of central Ohio under a slight risk for excessive rainfall. Follow the latest Storm team 4 forecast, see live radar, and get weather alerts from Copyright 2025 Nexstar Media, Inc. All rights reserved. This material may not be published, broadcast, rewritten, or redistributed.
Yahoo
2 hours ago
- Yahoo
Live updates: NWS issues severe thunderstorm warnings for Lincoln, Minnehaha counties
Update as of 8:30 p.m.: Parts of Minnehaha and McCook counties are under a severe thunderstorm warning until 9:15 p.m., including Salem, Hartford, Tea and Baltic. Update as of 7:57 p.m.: Parts of Lincoln County, including Lennox, are under a severe thunderstorm warning until 9 p.m. Winds up to 70 mph are expected, the NWS states. Update as of 7:45 p.m.: Storms are nearing the Sioux Empire area, and as of now, no tornado watch or warning is in effect with this system, NWS radars show. There are multiple severe thunderstorm warnings to the west still. The Parker Volunteer Fire/Rescue posted that the new school storm shelter will be open for any families needing shelter from 7 to 11 p.m. Update as of 6:50 p.m.: A tornado was issued for Plankinton, White Lake and Stickney until 7:30 p.m. At least five severe thunderstorm warnings were in effect as of this update, stretching from Gregory to north of Watertown, as the system continues to move east across the state. The storms have yet to reach the Sioux Empire. A tornado warning has also been issued for Wagner, Lake Andes and Marty until 7:45 p.m. Update as of 6:40 p.m.: The NWS says it's closely monitoring two tornadic supercells moving southeast. The one near Pickstown could contain a rain-wrapped tornado. Update as of 6:30 p.m.: Reed Timmer, a well-known meteorologist and storm chaser in the area for today's storm system, captured video of a tornado and wildfire and shared the moment on X. He stated he had seen three tornadoes, wildfire and gorilla hail east of Hamlin and south of Chamberlain so far. Update as of 6:15 p.m.: A tornado warning has been issued for Lake Andes, Bonesteel and Pickstown until 7 p.m. Storm chaser Reed Timmer is in South Dakota tonight, hunting for a tornado One has also been issued for White Lake, Storla and Plankinton until that same time. Update as of 6 p.m.: A tornado was spotted on the ground north of Bonesteel, according to the NWS. A tornado warning is in affect until 6:15 p.m. for that area. Update as of 5:40 p.m.: The NWS has issued a fourth tornado warning, this time for Kimball and Pukwana until 6:15 p.m. The warning affects about 2,000 people and five schools. Amid the tornado warnings, the NWS has also missed a couple severe thunderstorm warnings, with the latest for Plate, Lake Andes and Burke until 6:30 p.m. the storm has wind gusts of 80 mph, the warning states. Update as of 5:30 p.m.: As storms fire up to the west of Sioux Falls, central South Dakota has already experienced multiple tornado warnings, according to the NWS. Three warnings have been issued so far, with the latest for Bonesteel and Saint Charles until 5:45 p.m., the NWS stated. The tornado was observed, and 2-inch hail was possible at the time. The warning area affects 366 people, and three schools. Before that, a tornado warning was issued for Platte, Bijou Hills and Lucas until 5:30 p.m. The twister was reportedly radar indicated. The area affected by this warning included about 2,300 people, five schools and one hospital. And the first observed for the day with this system was for Lucas and Academy until 5 p.m. That warned area included 550 people and two schools. More to the north, the NWS issues at least two tornado warnings between 5 p.m. and 6:15 p.m. for areas including Stephens and Gann Valley. It's unclear at this time to what extent damage or injuries might exist from any of those warnings at this time. As of 5 p.m., Gov. Larry Rhoden shared on X that his administration was monitoring today's storm system. Earlier story: Chances for severe weather the night of July 28 into the early hours of July 29 have increased significantly in the Sioux Falls area, according to the National Weather Service. NWS' latest update from 12:30 p.m. July 28 about a system expected to bring a "significant wind event" to the area shows the thunderstorm risk level went from enhanced to moderate for the area. The timing was also pushed back to between 5 p.m. and 1 a.m., instead of 4 p.m. and 7 p.m. As of 3:45 p.m., much of central and eastern South Dakota is under a severe thunderstorm watch until 10 p.m., including Sioux Falls, Aberdeen, Brookings, Yankton and Pierre. More: City: Outdoor warning sirens will now sound for 'destructive severe thunderstorm warnings' What's expected for Sioux Falls? While Sioux Falls could see all modes of severe weather tonight, the main concern is the chance of wind gusts reaching 80 mph or greater, or the system evolving into a derecho, with hurricane-force wind speeds. A derecho is a widespread, long-lived wind storm associated with a band of rapidly moving showers or thunderstorms, according to the National Weather Service. A derecho can produce destruction similar to tornadoes, and the term "straight-line wind damage" is sometimes used to describe derecho damage. More: Here's what we know about the tornado confirmed near Watertown on July 27 "By definition, if the wind damage swath extends more than 240 miles and includes wind gusts of at least 58 mph or greater along most of its length, then the event may be classified as a derecho," the weather service says. For Sioux Falls, there's a 45% chance the area may see 80 mph winds or more. What are the other risks for Sioux Falls and surrounding areas? An extreme heat warning remains in effect through 8 p.m. July 28, with heat indices reaching to more than 105 in some areas. There's a 15% chance the area could see hail up to 1.5 inches in diameter, or ping-pong ball sized, which is enough to damage vehicles and homes, according to the NWS. More: 200 million Americans face extreme heat today as a derecho looms And there's a 5% chance of a few tornadoes as well. Localized areas could also see heavy downpours of 1-2 inches of rain, with isolated pockets up to 3 inches possible, the agency stated. More: Derechos are more common in South Dakota than you might think What's next? Sioux Falls has a marginal risk July 29 in the evening for scattered storms to return, but the exact timing and severity of those storms is still to be determined, the agency stated. This article originally appeared on Sioux Falls Argus Leader: NWS: Severe thunderstorm watch issued for parts of South Dakota Solve the daily Crossword
