The National Weather Service predicts a heatwave in Oklahoma with temperatures near 95°F and heat index values close to 100°F, emphasizing the need for hydration and sunscreen.

Chicago anticipates a hot weekend with potential triple-digit heat index values, following today's clearer conditions. Thunderstorms may arrive, leading up to days of extreme heat and further storms into the early week.

Nashville experiences hot summer days with highs near 92°F and a heat index up to 102°F; slight cooling at night.

The National Weather Service predicts extreme heat for Dallas, with temperatures reaching up to 97°F and heat indices up to 105°F, advising residents to prepare for health risks and minimal relief.

San Antonio faces a week of extreme heat, with temperatures near 100 degrees and heat indices up to 105. The NWS advises caution, noting minimal nighttime relief and a slight chance of showers and thunderstorms.

Knoxville's NWS warns of dense fog and advises caution due to reduced visibility. Showers and high temperatures expected, with a slight chance of thunderstorms.

Raleigh faces hazardous weather with heavy rain and possible flash flooding, as a 70% chance of precipitation continues through the day, possibly impacting central North Carolina.

Miami's weather today is mostly sunny with a chance of afternoon thunderstorms, a high of 91°F, and a heat index up to 103°F. Evening storm chances drop to 10%.

The National Weather Service forecasts sunny and hot weather for St. Louis, with highs reaching the upper 90s and a slight chance of showers by Tuesday.

The forecast for Atlanta indicates typical summer weather with afternoon showers and thunderstorms, highs near 90 degrees, and mild evenings in the low 70s.

Memphis faces a severe heatwave with temperatures reaching up to 98 degrees and heat index values as high as 106, despite chances of isolated showers and thunderstorms. Residents are advised to take precautions against the heat.

NYC weather forecast includes intermittent showers, highs in the upper 80s, and mostly sunny days with slight cooling early next week. No severe weather expected.

The National Weather Service forecasts mixed weather in Washington D.C. with sunny skies, potential thunderstorms, and high temperatures in the low 90s.