US Heat Wave Map: Forecast Live Temperature Tracker
Based on facts, either observed and verified firsthand by the reporter, or reported and verified from knowledgeable sources.
Newsweek AI is in beta. Translations may contain inaccuracies—please refer to the original content.
A massive heat dome will bring stifling temperatures and oppressive humidity for millions across much of the United States in the coming days.
Meteorologists are forecasting that the high-pressure system will cause widespread high temperatures, with daytime readings in the 90s Fahrenheit (30s Celsius) and nights offering little relief, dropping only into the mid-70s Fahrenheit (mid-20s Celsius).
Interactive maps by Windy.com showed the affected areas and the severity of the heat wave.
Heat wave: Live temperature tracker map
The most severe impacts are expected in Nebraska, Illinois, Wisconsin, and Iowa, where officials warn that health risks from the extreme heat could be especially acute this weekend.
"A lot of those folks have been saying, where's summer? Well, buckle up, because it's coming," said Tom Kines, a meteorologist at private firm AccuWeather.
Intense humidity could make temperatures feel 20 degrees higher
The developing heat dome poses not only discomfort but also serious health risks. The combination of high temperatures and intense humidity could push the heat index—the "feels-like" temperature—20 degrees above the actual reading in some areas, Kines said.
Heat wave: Humidity live tracker
Cities such as Chicago, Denver, Washington, D.C., and New York are all forecast to hit the mid to upper 90s Fahrenheit, with some places approaching triple digits.
A special heat risk scale used by the NWS indicates that several states, including parts of Nebraska, Kansas, Iowa, Missouri, and Illinois, will experience the most severe rating—category 4—over the weekend. In these conditions, lack of access to cooling or hydration could quickly become dangerous, particularly for vulnerable people.
Heat wave: Solar power live tracker map
What is a heat dome?
The heat dome, defined as a high-pressure system in the upper atmosphere that traps heat and moisture below, is being driven by seasonal weather patterns and moisture pulled from the Gulf of Mexico. Jacob Asherman of the NWS Weather Prediction Center explained that while the Gulf's moisture surge is typical for late spring and summer, the scale of this dome is significant.
Moisture blown northward from the Gulf of Mexico is fueling the muggy weather, Asherman told The Associated Press. The Gulf, which borders both the U.S. and Mexico, was renamed by President Donald Trump as the "Gulf of America."
Heat wave: Thunderstorms live tracker map
Even typically dry areas are seeing a spike in heat. Denver is expected to hit 100°F (38°C) by Friday. Corn-growing regions like Iowa may experience added discomfort due to "corn sweat," a phenomenon in which crops release moisture into the air, further raising humidity levels. "It's not as bad as a sauna, but it definitely would have a sauna effect," said Madison County farmer Ryan Marquardt. "It's humid in there (the cornfield), so you're gonna sweat."
Heat wave: Weather warnings live tracker map
The extreme heat is expected to last into next week, potentially setting the tone for a long, hot summer. Forecasts suggest sustained high temperatures across the Midwest and Northeast, raising concerns about public health.
This article includes reporting from The Associated Press.
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Boston Globe
6 hours ago
- Boston Globe
Heat dome will blanket much of the US, with worrisome temperatures in Midwest
'A lot of those folks have been saying, where's summer? Well, buckle up, because it's coming,' said Kines. The humid conditions will make places that exceed 90 degrees Fahrenheit feel as much as 20 degrees hotter, said Kines. In Boston, highs in the mid- to upper 90s are forecast for Monday and Tuesday. Advertisement A heat dome occurs when a large area of high pressure in the upper atmosphere acts as a reservoir that traps heat and humidity, said Ricky Castro, a National Weather Service meteorologist in Illinois. Get Starting Point A guide through the most important stories of the morning, delivered Monday through Friday. Enter Email Sign Up According to the NWS Weather Prediction Center, daytime temperatures will be in the 90s Fahrenheit and overnight temperatures will only drop to the mid-70s Fahrenheit from the Great Lakes to the East Coast during the heat wave that's expected to last into next week. Moisture blown northward from the Gulf of Mexico is fueling the muggy weather, said Jacob Asherman, a Weather Prediction Center meteorologist. This influx of moisture is fairly typical during late spring and summer, he said. The Gulf, which shares borders with Mexico and the US, was renamed by President Trump to the Gulf of America. Advertisement The heat will be widespread into next week. On Friday, Denver could reach 100 degrees, according to the weather service. Chicago temperatures could reach 96 on Sunday. On Tuesday, Washington, D.C., could see a high of 99 and New York Central Park could reach 96. Several states in the Midwest could see dangerous temperature impacts over the weekend, according to a weather service measure that rates the risk from zero to four. Parts of Nebraska and Kansas will be in the highest category on the scale on Saturday, meaning that anyone without effective cooling or sufficient hydration could face health risks. On Sunday, Iowa, Wisconsin, Missouri, and Illinois also see a category 4 rating. Humidity is the amount of water vapor in the air, and the heat index is what the temperature feels like when the humidity outside is factored in, according to the weather service. When humans sweat, it cools the body down because it absorbs and removes heat as it evaporates off the skin. The air is saturated with water on humid days, which makes it harder for sweat to evaporate. Hot and humid days can be dangerous when the body is unable to cool itself off and can exacerbate pre-existing health conditions and even lead to heat stroke. Minimizing direct sun exposure, wearing loose and light-colored clothing, staying hydrated, and spending time in air-conditioned spaces are ways to cool down during extreme heat, according to the NWS. Some parts of the US, such as Phoenix, Ariz., are famously hot without the mugginess. Phoenix and nearby desert regions experience this so-called 'dry heat' due to being located far away from large water bodies, mountains that block moist air masses, and weather patterns that bring scarce precipitation. Advertisement Sweat evaporates faster in dry climates compared to humid ones. This can be dangerous because it is easy to underestimate how dehydrated you are, according to Johns Hopkins University and Johns Hopkins Health System. In places such as Iowa, crops can affect the humidity in summer months. Plants feel the effects of hot weather and some people in the Midwest are familiar with " corn sweat," which is when crops move water to their leaves and other surfaces so it can evaporate, according to the Ohio State University. Madison County, Iowa, farmer Ryan Marquardt said corn sweat is 'not as bad as a sauna, but it definitely would have a sauna effect. It's humid in there (the cornfield), so you're gonna sweat.'
Newsweek
7 hours ago
- Newsweek
US Heat Wave Map: Forecast Live Temperature Tracker
Based on facts, either observed and verified firsthand by the reporter, or reported and verified from knowledgeable sources. Newsweek AI is in beta. Translations may contain inaccuracies—please refer to the original content. A massive heat dome will bring stifling temperatures and oppressive humidity for millions across much of the United States in the coming days. Meteorologists are forecasting that the high-pressure system will cause widespread high temperatures, with daytime readings in the 90s Fahrenheit (30s Celsius) and nights offering little relief, dropping only into the mid-70s Fahrenheit (mid-20s Celsius). Interactive maps by showed the affected areas and the severity of the heat wave. Heat wave: Live temperature tracker map The most severe impacts are expected in Nebraska, Illinois, Wisconsin, and Iowa, where officials warn that health risks from the extreme heat could be especially acute this weekend. "A lot of those folks have been saying, where's summer? Well, buckle up, because it's coming," said Tom Kines, a meteorologist at private firm AccuWeather. Intense humidity could make temperatures feel 20 degrees higher The developing heat dome poses not only discomfort but also serious health risks. The combination of high temperatures and intense humidity could push the heat index—the "feels-like" temperature—20 degrees above the actual reading in some areas, Kines said. Heat wave: Humidity live tracker Cities such as Chicago, Denver, Washington, D.C., and New York are all forecast to hit the mid to upper 90s Fahrenheit, with some places approaching triple digits. A special heat risk scale used by the NWS indicates that several states, including parts of Nebraska, Kansas, Iowa, Missouri, and Illinois, will experience the most severe rating—category 4—over the weekend. In these conditions, lack of access to cooling or hydration could quickly become dangerous, particularly for vulnerable people. Heat wave: Solar power live tracker map What is a heat dome? The heat dome, defined as a high-pressure system in the upper atmosphere that traps heat and moisture below, is being driven by seasonal weather patterns and moisture pulled from the Gulf of Mexico. Jacob Asherman of the NWS Weather Prediction Center explained that while the Gulf's moisture surge is typical for late spring and summer, the scale of this dome is significant. Moisture blown northward from the Gulf of Mexico is fueling the muggy weather, Asherman told The Associated Press. The Gulf, which borders both the U.S. and Mexico, was renamed by President Donald Trump as the "Gulf of America." Heat wave: Thunderstorms live tracker map Even typically dry areas are seeing a spike in heat. Denver is expected to hit 100°F (38°C) by Friday. Corn-growing regions like Iowa may experience added discomfort due to "corn sweat," a phenomenon in which crops release moisture into the air, further raising humidity levels. "It's not as bad as a sauna, but it definitely would have a sauna effect," said Madison County farmer Ryan Marquardt. "It's humid in there (the cornfield), so you're gonna sweat." Heat wave: Weather warnings live tracker map The extreme heat is expected to last into next week, potentially setting the tone for a long, hot summer. Forecasts suggest sustained high temperatures across the Midwest and Northeast, raising concerns about public health. This article includes reporting from The Associated Press.
Yahoo
9 hours ago
- Yahoo
‘Ring of fire' thunderstorms to erupt on building heat dome in central, eastern US
As a major heat wave builds and takes center stage in the weather from late this week to next week, groups of severe thunderstorms will erupt on the edge of the dome of hot air, AccuWeather meteorologists advise. The storms will take on a "ring of fire" effect, erupting first over parts of the northern Plains and Midwest, followed by portions of the Northeast and finally the Southwest and central Plains. The intense high pressure and sinking air within a heat dome make it difficult for thunderstorms to form in large numbers. However, thunderstorms tend to erupt on the edges of the heat dome, as the high pressure area is weakest in these areas, allowing columns of air to rise and form towering clouds and gusty downpours. Storms into Thursday night One of the first rounds of severe storms will extend from the Dakotas to Wisconsin and the Upper Peninsula of Michigan into Thursday night. Storms in this zone will pack torrential downpours, powerful wind gusts and perhaps damaging hail. Severe weather to ramp up Friday night On Friday, part of the same zone will be affected by thunderstorms. As the heat dome expands northward, it will squeeze the zone of severe weather farther to the north. "There is growing concern that a potent complex of severe thunderstorms will charge from North Dakota to northern Minnesota, northern Wisconsin and part of the Upper Peninsula of Michigan during Friday night," AccuWeather Meteorologist Emma Belscher said, "This threat could evolve into a concentrated, high-risk zone of severe weather." Along with the likelihood of storms packing powerful wind gusts, significant hail and flash flooding, there may also be a few tornadoes produced by the quick-moving thunderstorm complex Friday night. Severe weather risk continues this weekend Additional rounds of thunderstorms, including severe weather, will pester the northern edge of the heat dome along the United States/Canada border near the Great Lakes, expanding to New England as the weekend progresses. One such complex of severe thunderstorms is forecast to develop in parts of Ontario and Quebec on Saturday. From there, the group of thunderstorms will roll southeastward into part of upstate New York and much of New England. From late Saturday to Saturday night. Where the storms roll through, they will hold back the heating or perhaps delay it for another day. Strong wind gusts and torrential downpours, which can disrupt travel and outdoor plans, will be the main threats from the storms from late Saturday to Saturday night in parts of the Northeast. If this thunderstorm complex holds together as it moves over the Atlantic, conditions next week could support the gradual development of a tropical rainstorm between Bermuda and the Carolinas. Plains storms to return next week "Farther west, on the opposite side of the heat dome, tropical moisture--some associated with Erick--will be drawn across New Mexico, Colorado and parts of the High Plains next week," Belscher said. "Where a channel of moisture persists in parts of the Southwest, it could help ease drought and wildfire concerns," she added. Both of these conditions will increase into this weekend as gusty winds and dry air sweep over the Southwest. The core of the heat dome will tend to turn off the daily downpours and thunderstorms from much of the Midwest to the mid-Atlantic. However, as is often the case with the weather, there can be some exceptions. Want next-level safety, ad-free? Unlock advanced, hyperlocal severe weather alerts when you subscribe to Premium+ on the AccuWeather app. AccuWeather Alerts™ are prompted by our expert meteorologists who monitor and analyze dangerous weather risks 24/7 to keep you and your family safer.
