Forecasters are warning of a "mega heat dome" set to impact the eastern United States next week, bringing sweltering temperatures and potentially sparking tropical storm development. This phenomenon results from the collision of two smaller heat domes, creating one massive system that will send temperatures soaring into the triple digits.

On Monday (June 29), St. Louis could experience temperatures as high as 106 degrees, while Chicago may see 102 degrees. Further south, Little Rock, Arkansas, is also forecasted to reach 106 degrees. By Wednesday (July 1), Cincinnati could hit 107 degrees, with Nashville and Detroit both expected to reach 104 degrees. Washington, D.C., might experience a scorching 111 degrees.

The heat dome's impact extends beyond high temperatures. According to AccuWeather, the heat dome could spark tropical storm development near the southern U.S. in the Atlantic and Gulf regions. Warm ocean waters combined with the heat dome's edge could allow storm clusters to organize into a tropical system as July begins.

The upcoming heatwave will affect the Great Plains, Ohio Valley, Great Lakes, and Southeastern U.S., with heat index values between 100 and 110 degrees, as reported by The Hill. The heatwave is expected to last throughout the week and possibly into the weekend in the southeast, challenging numerous temperature records.

Dr. Ryan Maue, writing for Weather Trader, indicates that the heat dome will center over Memphis, Tennessee, and bake the Southeast. This setup could lead to fewer tropical moisture plumes from the Gulf of Mexico, resulting in warmer temperatures and lower rain chances.

Residents in affected areas are advised to prepare for extreme heat and monitor weather updates for potential tropical developments.

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