A storm rolls into Chicago after a brutally hot day on Aug. 27. (Tess Crowley/Chicago Tribune/AP)

By Ian Livingston

Although there will be more brutal heat to come, summer is over and fall is here, according to the climatological calendar. June through August will enter the record books as abnormally hot for a considerable portion of the Lower 48 states.

Large parts of the western United States notched their hottest summer on record, including Phoenix and Las Vegas. Hot weather frequently visited both coasts and scorched the northern and southern borders.

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