SIOUX FALLS, S.D. (AP) — The National Weather Service is forecasting more hot temperatures across the Dakotas on Thursday.

The Weather Service's Bismarck office says Williston, North Dakota, reached 100 degrees on Wednesday, breaking the record of 99 for this day set in 1901. The heat index, which takes into account humidity, is expected to reach 100 in some areas on Thursday afternoon.

The Weather Service's Sioux Falls office says warm and humid conditions will continue into the Labor Day weekend. Afternoon heat index values on Thursday are expected to peak in the mid- to upper-90s. Temperatures topped 100 in Winner on Wednesday.

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