Where heavy rain will hit already soggy regions of the U.S. this week
Parts of the Mid-South and Appalachian region are at risk of locally heavy rains and potential flooding, as are portions of the South and Midwest.
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Yahoo
an hour ago
- Yahoo
As Midwest flooding eases, dangerous temperatures set in
As parts of the Midwest continued to experience catastrophic flooding overnight and into Monday, dangerous heat and humidity are expected to set in this week. Overnight, a flash flood emergency was declared in central Illinois for catastrophic flooding as rain fell at rates of 2 to 3 inches per hour. The area in and surrounding Brownstown, Illinois, seems to have taken the brunt of the rapid rainfall that made streets impassable. That flash-flood emergency has since expired, and light rain continued to fall across central Illinois early Monday morning. The St. Louis, Missouri, metro area was also under a flash flood warning overnight, with rainfall rates of 2 to 3 inches per hour. The rainfall total as of 5 a.m. was around 1.25 inches, but additional heavy rain is possible on Monday. A slew of "considerable" flash flood warnings were issued in the east-central Missouri region on Monday morning -- including for Montgomery City, where 3 to 6 inches of rain had fallen and more was expected. Around 8 million people from northeast Missouri to western Kentucky and West Virginia were under a flash flood watch on Monday. Heavy rain also fell Sunday in Dover, Maryland, where the finish of Sunday's NASCAR Cup Series race at Dover Motor Speedway was delayed for 56 minutes. Extreme precipitation events jump 60% in the Northeast This summer has been one of extreme flooding throughout much of the United States with multiple 100-year rainfall events. While meteorologists cannot say for sure what is causing this summer's record rainfall, scientist have surmised that human-amplified climate change is causing extreme rainfall events to become more frequent and more intense. Human-amplified climate change has contributed to increases in the frequency and intensity of the heaviest precipitation events across nearly 70% of the United States, according to the U.S. Fifth National Climate Assessment. In the Midwest, extreme precipitation events have increased by about 45% in recent decades, the second largest regional increase in the nation, according to the assessment. Extreme precipitation events are very rare, defined as the top 1% of daily extreme precipitation events. In the Northeast, extreme precipitation events have increased by about 60% in recent decades, the largest regional increase in the United States. And in the Southeast, extreme rainfall events have jumped about 37% in recent decades, according to the assessment. 90 million people bracing for dangerous heat Meanwhile, 90 million people in the Midwest and South are bracing for widespread high levels of heat and humidity this week that is potentially dangerous to human health. Multiple days of extreme heat warnings are in place from Kansas to Missouri and down the Mississippi River Valley to Mississippi. This includes St. Louis, Tulsa, and Memphis where heat indices, which factor in humidity, could make it feel 111 degrees on Monday. In Kansas City, the heat index could climb to 107 through Thursday. From South Dakota to Nebraska, heat indices could reach 102 to 108 on Monday and Tuesday. MORE: Threat of flash flooding hits the Midwest amid a dangerous heat warning Much of the South, from Louisiana to Florida and up through the Carolinas, are under a heat advisory as the heat indices are expected to range from 108 to 112 on Monday. This heat and humidity will continue through much of the week for the Midwest and South. Chicago, where an extreme heat watch is in place, could feel like up to 110 on Wednesday and Thursday. MORE: Number of missing in Texas floods drops from nearly 100 to 3 in hard-hit county For the Northeast, the week will start on the cooler side with seasonal or below-average temperatures on Monday and Tuesday -- but heat from the Midwest is expected to surge east later this week. On Friday, near-record high temperatures are possible along the I-95 corridor from Philadelphia to Boston, including New York City, with possible highs in the mid to upper 90s. New York City could break a daily temperature record on Friday of 97 degrees, set in 1999. A heat wave consisting of at least three consecutive days of temperatures in the 90s is expected to invade New York City from Thursday to Saturday. Nighttime low temperatures will only cool to the upper 70s, making it more dangerous for those without access to air conditioning.
CNN
an hour ago
- CNN
Extreme heat is about to return — here's where it will be the worst
Extreme temperaturesFacebookTweetLink Follow The United States has entered the peak of summer and a new heat dome — sealing in all that hot, humid air — is about to make millions of people feel every bit of it. Some cities could notch their highest temperatures of the year as heat builds from the South to the Midwest this week while humidity drives the heat index, or how hot it will actually feel, well into the triple digits. Heat remains the deadliest form of extreme weather in the US. Globally, heat waves are becoming more frequent, more severe and lasting longer as the world warms due to fossil fuel-driven climate change. Sizzling conditions will start to build from the Gulf Coast to the Plains on Tuesday but will ramp up in intensity and expand to the Midwest on Wednesday. Brutal heat will stretch from the South through the Midwest on Thursday and also start to push into the East. Wednesday and Thursday could be the new hottest days of the year in cities like Chicago, St. Louis and Memphis, Tennessee: Chicago and St. Louis are expected to soar into the upper 90s both days while Memphis could flirt with the triple digit mark starting as early as Tuesday. Unlike the intense heat wave earlier this summer, this bout of stifling heat isn't likely to topple hundreds of records. But records don't need to fall for heat to be incredibly dangerous: A Level 3 of 4 heat risk stretches from the Gulf Coast to Minnesota on Tuesday and as far north as Michigan's Upper Peninsula on Wednesday. This level of heat risk means anyone without access to effective cooling or proper hydration is impacted, not just vulnerable populations, according to the National Oceanic and Atmospheric Administration. And for those without air conditioning, staying indoors can become deadly during the hottest parts of the day, the agency warns. The heat index — also known as the apparent temperature — will soar to dangerous levels for tens of millions this week. It will reach the triple digits from the South up to parts of Minnesota and South Dakota on Tuesday. By Wednesday, some parts of the Mississippi Valley, including Memphis, could have a heat index of between 110 and 115 degrees. Humid conditions will also prevent temperatures from cooling significantly overnight. It could still be close to 80 degrees in St. Louis by sunrise Thursday — nearly 10 degrees higher than a typical low for July. When overnight temperatures don't cool down enough to offer relief for overheated bodies, people are at greater risk for heat-related illnesses. Nighttime temperatures are taking the hardest hit from climate change, warming faster than daytime highs. The heat will ramp up considerably Thursday in parts of the Ohio Valley and start to reach into the Northeast. Detroit, Cleveland and Cincinnati could come within a degree of or match their hottest day of the year so far, with expected highs in the 90s. These highs are about 10 degrees hotter than what's typical even in this hottest month of the year. The most intense heat for the East Coast will arrive by Friday, with high temperatures in the middle to upper 90s and a heat index of 100 degrees or more possible for Washington, DC, Philadelphia, New York City and Boston. High temperatures in this range are also up to 10 degrees hotter than typical for these cities. The heat dome will ease by Saturday for many, replaced by more typical, though still very toasty, late July temperatures. For many in the contiguous US, it's been sweltering since meteorological summer — June through August — began. The bulk of the heat has been focused on the East, where dozens of locations are so far on track for their hottest summer to date. Many more locales are currently experiencing at least one of their 10-hottest summers to date. The Northeast, Mid-Atlantic, Ohio Valley and Midwest have all been literal hotspots. Rather than searing daytime temperatures driving the above-average heat in these locations, it's been many, many instances of too-warm overnight lows making the biggest impact, according to a CNN analysis of data from NOAA's National Climatic Data Center. The Plains have so far dodged this really hot summer. Much of the West has too, with a few exceptions: Seattle is having its fifth-warmest summer to date while Portland is hovering around seventh-highest. Tiny pockets of cooler-than-normal summers are few and far between in the US, but the San Fransisco Bay Area in California is one of them. Parts of the Bay Area — including Oakland and Fremont — are experiencing one of their coolest summers to date. August will likely be another hot month for much of the country, according to the Climate Prediction Center's latest forecast. Cities that are already baking could continue their hot streak while other places that have escaped the worst could still warm up a bit in the latter part of summer.
CNN
an hour ago
- CNN
Extreme heat is about to return — here's where it will be the worst
Extreme temperaturesFacebookTweetLink Follow The United States has entered the peak of summer and a new heat dome — sealing in all that hot, humid air — is about to make millions of people feel every bit of it. Some cities could notch their highest temperatures of the year as heat builds from the South to the Midwest this week while humidity drives the heat index, or how hot it will actually feel, well into the triple digits. Heat remains the deadliest form of extreme weather in the US. Globally, heat waves are becoming more frequent, more severe and lasting longer as the world warms due to fossil fuel-driven climate change. Sizzling conditions will start to build from the Gulf Coast to the Plains on Tuesday but will ramp up in intensity and expand to the Midwest on Wednesday. Brutal heat will stretch from the South through the Midwest on Thursday and also start to push into the East. Wednesday and Thursday could be the new hottest days of the year in cities like Chicago, St. Louis and Memphis, Tennessee: Chicago and St. Louis are expected to soar into the upper 90s both days while Memphis could flirt with the triple digit mark starting as early as Tuesday. Unlike the intense heat wave earlier this summer, this bout of stifling heat isn't likely to topple hundreds of records. But records don't need to fall for heat to be incredibly dangerous: A Level 3 of 4 heat risk stretches from the Gulf Coast to Minnesota on Tuesday and as far north as Michigan's Upper Peninsula on Wednesday. This level of heat risk means anyone without access to effective cooling or proper hydration is impacted, not just vulnerable populations, according to the National Oceanic and Atmospheric Administration. And for those without air conditioning, staying indoors can become deadly during the hottest parts of the day, the agency warns. The heat index — also known as the apparent temperature — will soar to dangerous levels for tens of millions this week. It will reach the triple digits from the South up to parts of Minnesota and South Dakota on Tuesday. By Wednesday, some parts of the Mississippi Valley, including Memphis, could have a heat index of between 110 and 115 degrees. Humid conditions will also prevent temperatures from cooling significantly overnight. It could still be close to 80 degrees in St. Louis by sunrise Thursday — nearly 10 degrees higher than a typical low for July. When overnight temperatures don't cool down enough to offer relief for overheated bodies, people are at greater risk for heat-related illnesses. Nighttime temperatures are taking the hardest hit from climate change, warming faster than daytime highs. The heat will ramp up considerably Thursday in parts of the Ohio Valley and start to reach into the Northeast. Detroit, Cleveland and Cincinnati could come within a degree of or match their hottest day of the year so far, with expected highs in the 90s. These highs are about 10 degrees hotter than what's typical even in this hottest month of the year. The most intense heat for the East Coast will arrive by Friday, with high temperatures in the middle to upper 90s and a heat index of 100 degrees or more possible for Washington, DC, Philadelphia, New York City and Boston. High temperatures in this range are also up to 10 degrees hotter than typical for these cities. The heat dome will ease by Saturday for many, replaced by more typical, though still very toasty, late July temperatures. For many in the contiguous US, it's been sweltering since meteorological summer — June through August — began. The bulk of the heat has been focused on the East, where dozens of locations are so far on track for their hottest summer to date. Many more locales are currently experiencing at least one of their 10-hottest summers to date. The Northeast, Mid-Atlantic, Ohio Valley and Midwest have all been literal hotspots. Rather than searing daytime temperatures driving the above-average heat in these locations, it's been many, many instances of too-warm overnight lows making the biggest impact, according to a CNN analysis of data from NOAA's National Climatic Data Center. The Plains have so far dodged this really hot summer. Much of the West has too, with a few exceptions: Seattle is having its fifth-warmest summer to date while Portland is hovering around seventh-highest. Tiny pockets of cooler-than-normal summers are few and far between in the US, but the San Fransisco Bay Area in California is one of them. Parts of the Bay Area — including Oakland and Fremont — are experiencing one of their coolest summers to date. August will likely be another hot month for much of the country, according to the Climate Prediction Center's latest forecast. Cities that are already baking could continue their hot streak while other places that have escaped the worst could still warm up a bit in the latter part of summer.
