A major heat dome is expected to build across the central and eastern U.S. next week, bringing widespread 90-degree temperatures and potentially dangerous heat just ahead of the Independence Day holiday. AccuWeather says the system will stretch from Texas to Pennsylvania and from Florida to Minnesota. Some areas could see temperatures approach 100 degrees, while it will feel like over 100 degrees in many locations. "A heat dome is a sprawling area of high pressure that creates hot and humid conditions for days or weeks at a time," said meteorologist Dan Pydynowski. The prolonged heat could add stress to crops, livestock, and farmworkers across parts of the Corn Belt and Plains. Overnight temperatures are also expected to remain unusually warm, limiting relief from daytime heat. Forecasters are also watching for the development of powerful thunderstorm complexes and possible derechos (deh-RAY-choes) along the edge of the heat dome.
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