Severe Heat Wave Set to Affect Much of the U.S. This Week

WHO:

CBS News - The National Weather Service is providing updates on the heat wave.

NBC News - The article discusses the impact of the heat wave on parts of the central and eastern United States.

WHAT:

NBC News - The forecast indicates that temperatures in Baltimore could reach and potentially surpass 100 degrees Fahrenheit on Thursday and Friday, with the heat index feeling like 105 to 110 degrees Fahrenheit.

Boston.com - An excessive heat watch is in effect from Wednesday to Friday, with heat index values expected to push to 105-110 degrees Fahrenheit on Thursday afternoon.

NY Post - Meteorologist Dan DePodwin stated, "It's going to be a very intense heatwave," warning of temperatures in NYC hitting and potentially surpassing 100 degrees Fahrenheit.

CBS News - The National Weather Service reported that the heat wave is expected to challenge record highs in several cities, with temperatures reaching well into the 90s and low 100s Fahrenheit (mid to high 30s Celsius).

NBC News - The heat index is projected to push above 100 degrees Fahrenheit (37.8 degrees Celsius) in many areas, with some regions experiencing indices as high as 110 degrees Fahrenheit (43.3 degrees Celsius).

NPR - The National Weather Service indicated that daytime temperatures could feel like 100 to 105 degrees Fahrenheit (37.8 to 40.6 degrees Celsius) after July 4, with limited overnight relief.

CBS News - The National Weather Service stated that the heat wave is expected to challenge three record highs and two morning lows in Baltimore, including one record from 1898, which is 128 years old.

NBC News - The forecast indicates that Baltimore may experience at least four days at or above 100°F, which would mark the third time on record for such a stretch.

CNN - Major cities including Chicago, Detroit, St. Louis, Dallas, and Nashville could see their hottest weather of the year during this heat wave.

NBC News - The forecast indicates that Baltimore may experience at least four days at or above 100°F, which would be the third time on record for such a stretch.

NBC News - This heat wave may challenge three record highs and two morning lows in Baltimore, including one record from 1898, dating back 128 years.

NPR - The National Weather Service reported that daytime temperatures could feel like 100 to 105 degrees and that risks for extreme heat are expected to continue after July 4.

CBS News - The heat wave is expected to push temperatures in several big cities to their highest levels of the year as they host World Cup matches.

NPR - The National Weather Service reported that daytime temperatures could feel like 100 to 105 degrees after July 4, with limited overnight relief.

NPR - The National Weather Service indicated that risks for extreme heat are expected to continue after July 4.

NPR - The heat could limit overnight relief, with temperatures remaining in the 80s and 90s during the evening.

CBS News - The heat wave is expected to last into next weekend across the Great Plains, southeast, and mid-Atlantic.

NBC News - The forecast indicates that Baltimore may experience at least three to four days at or above 100°F, which would be the third time on record for such a stretch.

NPR - The National Weather Service reported that daytime temperatures could feel like 100 to 105 degrees after July 4, with limited overnight relief.

CBS News - The heat wave is expected to push temperatures in Baltimore to at least three record highs and two morning lows, including one record from 1898, dating back 128 years.

NBC News - The forecast indicates that Baltimore may experience at least three to four days at or above 100°F.

CBS News - A long and dangerous heat wave is affecting a large swath of the United States.

CBS News - Temperatures are expected to reach well into the 90s and low 100 degrees Fahrenheit (mid to high 30s Celsius).

CBS News - Heat indices are projected to be between 100 to 110 degrees Fahrenheit (40 C to 43 C), and as high as 115 degrees Fahrenheit (46 C).

CBS News - The heat wave is impacting more than half of the country.

NBC News - The heat wave is expected to grip parts of the central and eastern United States ahead of Independence Day celebrations.

WHERE:

NBC News - Nearly half the country is on alert for dangerous oppressive temperatures, with specific warnings for the eastern United States, including cities like New York, Philadelphia, and Washington, D.C.

NBC News - The heat wave is expected to impact parts of the central and eastern United States, particularly in cities like New York, Philadelphia, and Washington, D.C.

NPR - Areas including Ohio, parts of North Carolina, and Washington, D.C., are particularly at risk due to extreme temperatures and humidity.

NPR - Parts of Iowa, Missouri, and Kansas are under extreme heat warnings.

CBS News - The heat wave is affecting the lower Great Lakes, the mid-Atlantic, and the Mississippi and Ohio River valleys.

CBS News - East Coast cities such as New York, Philadelphia, Washington, and Baltimore are feeling the heat.

CBS News - Midwestern cities including Chicago, St. Louis, and Detroit are also experiencing high temperatures.

CBS News - Southern cities like Dallas, Little Rock, Arkansas, and Memphis, Tennessee, will see high temperatures.

CBS News - Much of the West remains unusually cool, with high temperatures running 20-35 degrees below average across portions of the Northwest and northern Rockies.

WHEN:

CBS News - The heat wave is expected to last into next weekend.

CBS News - The heat wave is occurring ahead of the July Fourth holiday.

WHY:

NPR - The National Weather Service reported that a heat dome is responsible for the extreme heat, which is expected to continue into the July 4 weekend.

NPR - The National Weather Service stated that a heat dome is responsible for the dangerous heat, which occurs when a very hot air mass is trapped over a region.

NPR - The National Weather Service indicated that a heat dome is driving the dangerous heat across the U.S. into the July 4 weekend.

NPR - A heat dome is driving the heat wave, which occurs when a very hot air mass parks itself over a region and gets trapped under a "lid" above the Earth's surface.

CBS News - The heat wave is the first widespread heat wave of the summer, according to forecasters.

HOW:

NPR - New York City Health Commissioner Alister Martin stated that heat strokes are "fast, deadly, and almost always preventable."

NPR - The Missouri State Emergency Management Agency advised everyone to "plan accordingly and limit prolonged outdoor exposure if possible" during the heat wave.

CBS News - The Centers for Disease Control and Prevention warns that signs of overheating include muscle cramping, dizziness, unusually heavy sweating, shortness of breath, headaches, weakness, and nausea.

CBS News - The Centers for Disease Control and Prevention advises limiting outdoor activity, staying hydrated, and ensuring access to air-conditioning during extreme temperatures.

(UPDATED June 29, 2026 17:47 UTC)

A significant heatwave is set to impact nearly half the country, with temperatures in cities like Baltimore and New York City potentially reaching or exceeding 100 degrees Fahrenheit, and heat index values feeling as high as 110 degrees. An excessive heat watch is in effect from Wednesday to Friday, warning residents in the eastern United States, including Philadelphia and Washington, D.C., to prepare for dangerously high temperatures. Meteorologist Dan DePodwin has indicated that this extreme heat, caused by a heat dome, is expected to persist into the July 4 weekend.

(UPDATED June 29, 2026 16:15 UTC)

A significant heat wave is set to challenge record highs across parts of the central and eastern United States, with cities like New York, Philadelphia, and Washington, D.C. bracing for temperatures soaring into the 90s and low 100s Fahrenheit. The heat index is expected to exceed 100 degrees Fahrenheit in many areas, with some regions feeling as hot as 110 degrees Fahrenheit, creating dangerous conditions. According to the National Weather Service, this extreme heat is caused by a heat dome, which traps a very hot air mass over the affected regions, and daytime temperatures could feel like 100 to 105 degrees Fahrenheit after July 4.

(UPDATED June 29, 2026 14:16 UTC)

A significant heat wave is sweeping across the U.S., with the National Weather Service warning that Baltimore could challenge three record highs and two morning lows, including a record from 1898. The forecast suggests that the city may face at least four consecutive days at or above 100°F, marking only the third time in history for such a stretch. Major cities like Chicago, Detroit, St. Louis, Dallas, and Nashville are also expected to experience their hottest weather of the year, as a heat dome drives these extreme temperatures into the upcoming July 4 weekend.

(UPDATED June 29, 2026 12:24 UTC)

Baltimore is bracing for a significant heat wave, with forecasts predicting at least four consecutive days at or above 100°F, marking only the third time in recorded history for such a stretch. This extreme weather may challenge three record highs and two morning lows, including a record dating back to 1898. Meanwhile, parts of Iowa, Missouri, and Kansas are under extreme heat warnings, and New York City Health Commissioner Alister Martin emphasizes that heat strokes can be "fast, deadly, and almost always preventable."

(UPDATED June 29, 2026 10:19 UTC)

A significant heat wave is set to push temperatures in major cities to their highest levels of the year, coinciding with World Cup matches. The National Weather Service warns that after July 4, daytime temperatures could feel like 100 to 105 degrees, with limited overnight relief as temperatures remain in the 80s and 90s. New York City Health Commissioner Alister Martin emphasized the dangers of heat strokes, describing them as "fast, deadly, and almost always preventable."

(UPDATED June 29, 2026 04:17 UTC)

A significant heat wave is expected to persist into next weekend across the Great Plains, southeast, and mid-Atlantic regions. In Baltimore, temperatures may soar to at least 100°F for three to four consecutive days, marking the third time on record for such an extreme stretch. The National Weather Service warns that after July 4, daytime temperatures could feel like 100 to 105 degrees, and the Missouri State Emergency Management Agency is urging residents to plan accordingly and limit prolonged outdoor exposure if possible.

(UPDATED June 28, 2026 23:16 UTC)

A significant heat wave is set to hit Baltimore, with temperatures expected to reach at least three record highs and two morning lows, including one that dates back to 1898. The forecast suggests that the city may experience three to four consecutive days at or above 100 degrees Fahrenheit. The Centers for Disease Control and Prevention is warning residents to be aware of signs of overheating, which include muscle cramping, dizziness, heavy sweating, shortness of breath, headaches, weakness, and nausea.

(UPDATED June 28, 2026 19:20 UTC)

A long and dangerous heat wave is currently affecting more than half of the United States, with temperatures expected to soar into the 90s and low 100s Fahrenheit. Major cities in the lower Great Lakes, mid-Atlantic, and parts of the Mississippi and Ohio River valleys, including New York, Philadelphia, Chicago, and Dallas, are feeling the impact, while much of the West remains unusually cool. The National Weather Service is warning that heat indices could reach between 100 to 115 degrees Fahrenheit, and the heat wave is anticipated to last into next weekend, just ahead of the July Fourth holiday.