Central U.S. continues to bake in heat wave
Heat continues to build across the Central U.S., where excessive heat warnings, watches, and advisories have been issued in 17 states. A strong, large ridge of high pressure, record drought in the south, and above average soil moisture in the Upper Midwest are to blame for this week's blistering heat. These events have combined to produce some extreme heat indices so far.
Selected heat index values from Sunday:
• 126°F in Newton, Iowa
• 125°F in Knoxville, Iowa
• 120°F in Mitchell, South Dakota
• 119°F in Madison, Minnesota
• 116°F in York, Nebraska
• 115°F in Bismarck, North Dakota
• 114°F in Volk/Camp Douglas, Wisconsin
• 112°F in Shawnee, Oklahoma
• 110°F in Topeka, Kansas
A The heat will stretch toward the East Coast by the end of the week, with a possible reprieve for the Upper Midwest in the forecast. However, high temperatures in the 90s are expected to remain in place through next weekend. Further south in Kansas and Oklahoma, high temperatures won't get below 100°F through Sunday.
According to the National Weather Service, extreme heat is typically the number one weather-related killer in the United States. Forecasters and public health officials alike are asking people to take precautions over the next week. Drink more water than you usually would, especially if you exercise or work outdoors. Avoid alcohol. Stay inside in air-conditioned buildings, and check on family and neighbors. Don't run the air conditioning too cool as this could lead to widespread power outages if everyone does the same. The demand on power plants will already be exceptionally high.
• Dallas, Texas
• Amarillo, Texas
• Oklahoma City, Oklahoma
• Kansas City, Missouri
• St. Louis, Missouri
• Omaha, Nebraska
• Des Moines, Iowa
• Rapid City, South Dakota
• Minneapolis, Minnesota
• Fargo, North Dakota
You can find your local forecast by entering your city or zip code in the search bar at the top of the page.
Current U.S. Heat Index
This colored contour map shows current heat index. Heat index is the apparent temperature considering both the temperature and relative humidity. The key below the image shows the corresponding heat index for each color.
Current U.S. Temperature
This colored contour map shows current temperatures. The key below the image shows the corresponding temperature value for each color.
Current U.S. Relative Humidity
This colored contour map shows current relative humidity. Relative humidity is the ratio of water vapor contained in the air to the maximum amount of water vapor that can be contained in the air at the current temperature. The key below the image shows the corresponding relative humidity for each color.