Three people are dead in North Dakota, and tens of thousands are without power in northern Minnesota and northwestern Wisconsin after powerful winds swept across the upper Midwest Friday and overnight Saturday.

Bemidji was rocked by the derecho that ripped across North Dakota and Minnesota. The ferocious storms that pounded North Dakota and Minnesota Friday night into Saturday morning left three people dead along its path of destruction.

Powerful winds -- including a tornado -- that swept across parts of the upper Midwest left three people dead and a regional airport heavily damaged, while nearly 150 million Americans were under a heat advisory or warning as the weekend warms up much of the U.