Slightly cooler weather is expected to breeze into the Tristate today, bringing an end to this week's heat alerts in Cincinnati and Northern Kentucky.

        A cool front from the north should end four consecutive days of 90 degree-plus temperatures — Thursday's high was 94 — the longest such stretch since July 1999, when the thermometer broke 90 degrees eight consecutive days, according to officials from the National Weather Service in Wilmington, Ohio.

        Malcolm Adcock, Cincinnati's health commissioner, said the city's heat alert, which opened cool centers earlier this week, would cease Thursday evening because of the forecast of lower temperatures.

        “People have done a reasonably good job at keeping themselves safe,” said Mr. Adcock.

        Mr. Adcock explained that city health officials had been tracking hospital emergency room visits for heat-related victims and emergency medical service runs but found no increase this week in either case.

        The Tristate's smog alert ended Wednesday night as air quality improved.

        Officials from the Northern Kentucky Independent District Health Department continued their heat alert through Thursday but closed all but one cool center — at the Greenup Haus at 1122 Greenup St. in Covington.

        High temperatures throughout the Tristate will drop slightly, down to the upper and middle 80s today and continuing through Sunday, said Brian Coniglio, a meteorologist for the NWS. A cool front drifting south from the Great Lakes region is providing relief.

        Dry conditions are expected to continue, with the first chance of rain Monday.

        Updated forecast at Cincinnati.com

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