Rapidly developing very hot and humid weather, with daytime temperatures reaching the 95 to 100 degree range, brought the heat index to above 100 during the afternoon hours of June 10th through June 12th. The heat came less than two days after a period of well below normal temperatures. Several roads buckled in the Sioux Falls area, and emergency rooms at hospitals reported that an unknown number of people suffered heat stress, heat exhaustion, or dehydration.

Excessive Heat in SANBORN, SOUTH DAKOTA
From 10-JUN-16 11:00:00 to 12-JUN-16 18:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Official NWS Observations

Temperatures reaching daytime highs of 95 to 100 after a period of cool weather were accompanied by humid conditions, with the heat index rising to a little above 100 degrees. An unknown number of people suffered from heat stress, heat exhaustion, or dehydration, as reported by hospital emergency rooms.

Excessive Heat in CHARLES MIX, SOUTH DAKOTA
From 10-JUN-16 11:00:00 to 12-JUN-16 18:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Official NWS Observations

Temperatures reaching daytime highs of 95 to 100 after a period of cool weather were accompanied by humid conditions, with the heat index rising to a little above 100 degrees. An unknown number of people suffered from heat stress, heat exhaustion, or dehydration, as reported by hospital emergency rooms.

Excessive Heat in BEADLE, SOUTH DAKOTA
From 10-JUN-16 11:00:00 to 12-JUN-16 18:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Official NWS Observations

Temperatures reaching daytime highs of 95 to 100 after a period of cool weather were accompanied by humid conditions, with the heat index rising to a little above 100 degrees. An unknown number of people suffered from heat stress, heat exhaustion, or dehydration, as reported by hospital emergency rooms.

Excessive Heat in DOUGLAS, SOUTH DAKOTA
From 10-JUN-16 11:00:00 to 12-JUN-16 18:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Official NWS Observations

Temperatures reaching daytime highs of 95 to 100 after a period of cool weather were accompanied by humid conditions, with the heat index rising to a little above 100 degrees. An unknown number of people suffered from heat stress, heat exhaustion, or dehydration, as reported by hospital emergency rooms.

Excessive Heat in LINCOLN, SOUTH DAKOTA
From 10-JUN-16 11:00:00 to 12-JUN-16 18:00:00 (CST-6)
Crop damage: 0.00K
Reported by: Official NWS Observations

Temperatures reaching daytime highs of 95 to 100 after a period of cool weather were accompanied by humid conditions, with the heat index rising to a little above 100 degrees. An unknown number of people suffered from heat stress, heat exhaustion, or dehydration, as reported by hospital emergency rooms. Some roads buckled significantly from the heat, including Interstate 229 in two places on the south end of Sioux Falls, and a road on the east side of the Interstate 29 interchange near Tea.

Excessive Heat in CLAY, SOUTH DAKOTA
From 10-JUN-16 11:00:00 to 12-JUN-16 18:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Official NWS Observations

Temperatures reaching daytime highs of 95 to 100 after a period of cool weather were accompanied by humid conditions, with the heat index rising to a little above 100 degrees. An unknown number of people suffered from heat stress, heat exhaustion, or dehydration, as reported by hospital emergency rooms.

Excessive Heat in UNION, SOUTH DAKOTA
From 10-JUN-16 11:00:00 to 12-JUN-16 18:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Official NWS Observations

Temperatures reaching daytime highs of 95 to 100 after a period of cool weather were accompanied by humid conditions, with the heat index rising to a little above 100 degrees. An unknown number of people suffered from heat stress, heat exhaustion, or dehydration, as reported by hospital emergency rooms.

Excessive Heat in BRULE, SOUTH DAKOTA
From 10-JUN-16 11:00:00 to 12-JUN-16 18:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Official NWS Observations

Temperatures reaching daytime highs of 95 to 100 after a period of cool weather were accompanied by humid conditions, with the heat index rising to a little above 100 degrees. An unknown number of people suffered from heat stress, heat exhaustion, or dehydration, as reported by hospital emergency rooms.

Excessive Heat in AURORA, SOUTH DAKOTA
From 10-JUN-16 11:00:00 to 12-JUN-16 18:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Official NWS Observations

Temperatures reaching daytime highs of 95 to 100 after a period of cool weather were accompanied by humid conditions, with the heat index rising to a little above 100 degrees. An unknown number of people suffered from heat stress, heat exhaustion, or dehydration, as reported by hospital emergency rooms.

Excessive Heat in HUTCHINSON, SOUTH DAKOTA
From 10-JUN-16 11:00:00 to 12-JUN-16 18:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Official NWS Observations

Temperatures reaching daytime highs of 95 to 100 after a period of cool weather were accompanied by humid conditions, with the heat index rising to a little above 100 degrees. An unknown number of people suffered from heat stress, heat exhaustion, or dehydration, as reported by hospital emergency rooms.

Excessive Heat in DAVISON, SOUTH DAKOTA
From 10-JUN-16 11:00:00 to 12-JUN-16 18:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Official NWS Observations

Temperatures reaching daytime highs of 95 to 100 after a period of cool weather were accompanied by humid conditions, with the heat index rising to a little above 100 degrees. An unknown number of people suffered from heat stress, heat exhaustion, or dehydration, as reported by hospital emergency rooms, including one in Mitchell.

Excessive Heat in HANSON, SOUTH DAKOTA
From 10-JUN-16 11:00:00 to 12-JUN-16 18:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Official NWS Observations

Temperatures reaching daytime highs of 95 to 100 after a period of cool weather were accompanied by humid conditions, with the heat index rising to a little above 100 degrees. An unknown number of people suffered from heat stress, heat exhaustion, or dehydration, as reported by hospital emergency rooms.

Excessive Heat in MINER, SOUTH DAKOTA
From 10-JUN-16 11:00:00 to 12-JUN-16 18:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Official NWS Observations

Temperatures reaching daytime highs of 95 to 100 after a period of cool weather were accompanied by humid conditions, with the heat index rising to a little above 100 degrees. An unknown number of people suffered from heat stress, heat exhaustion, or dehydration, as reported by hospital emergency rooms.

Excessive Heat in LAKE, SOUTH DAKOTA
From 10-JUN-16 11:00:00 to 12-JUN-16 18:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Official NWS Observations

Temperatures reaching daytime highs of 95 to 100 after a period of cool weather were accompanied by humid conditions, with the heat index rising to a little above 100 degrees. An unknown number of people suffered from heat stress, heat exhaustion, or dehydration, as reported by hospital emergency rooms.

Excessive Heat in MOODY, SOUTH DAKOTA
From 10-JUN-16 11:00:00 to 12-JUN-16 18:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Official NWS Observations

Temperatures reaching daytime highs of 95 to 100 after a period of cool weather were accompanied by humid conditions, with the heat index rising to a little above 100 degrees. An unknown number of people suffered from heat stress, heat exhaustion, or dehydration, as reported by hospital emergency rooms.

Excessive Heat in KINGSBURY, SOUTH DAKOTA
From 10-JUN-16 11:00:00 to 12-JUN-16 18:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Official NWS Observations

Temperatures reaching daytime highs of 95 to 100 after a period of cool weather were accompanied by humid conditions, with the heat index rising to a little above 100 degrees. An unknown number of people suffered from heat stress, heat exhaustion, or dehydration, as reported by hospital emergency rooms.

Excessive Heat in BROOKINGS, SOUTH DAKOTA
From 10-JUN-16 11:00:00 to 12-JUN-16 18:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Official NWS Observations

Temperatures reaching daytime highs of 95 to 100 after a period of cool weather were accompanied by humid conditions, with the heat index rising to a little above 100 degrees. An unknown number of people suffered from heat stress, heat exhaustion, or dehydration, as reported by hospital emergency rooms.

Excessive Heat in JERAULD, SOUTH DAKOTA
From 10-JUN-16 11:00:00 to 12-JUN-16 18:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Official NWS Observations

Temperatures reaching daytime highs of 95 to 100 after a period of cool weather were accompanied by humid conditions, with the heat index rising to a little above 100 degrees. An unknown number of people suffered from heat stress, heat exhaustion, or dehydration, as reported by hospital emergency rooms.

Excessive Heat in MCCOOK, SOUTH DAKOTA
From 10-JUN-16 11:00:00 to 12-JUN-16 18:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Official NWS Observations

Temperatures reaching daytime highs of 95 to 100 after a period of cool weather were accompanied by humid conditions, with the heat index rising to a little above 100 degrees. An unknown number of people suffered from heat stress, heat exhaustion, or dehydration, as reported by hospital emergency rooms.

Excessive Heat in MINNEHAHA, SOUTH DAKOTA
From 10-JUN-16 11:00:00 to 12-JUN-16 18:00:00 (CST-6)
Crop damage: 0.00K
Reported by: Official NWS Observations

Temperatures reaching daytime highs of 95 to 100 after a period of cool weather were accompanied by humid conditions, with the heat index rising to a little above 100 degrees. An unknown number of people suffered from heat stress, heat exhaustion, or dehydration, as reported by hospital emergency rooms, including two in Sioux Falls. Some roads buckled significantly from the heat, including Interstate 90 near the Minnesota border, and State Highway 115 2 miles north of Sioux Falls.

Excessive Heat in GREGORY, SOUTH DAKOTA
From 10-JUN-16 11:00:00 to 12-JUN-16 18:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Official NWS Observations

Temperatures reaching daytime highs of 95 to 100 after a period of cool weather were accompanied by humid conditions, with the heat index rising to a little above 100 degrees. An unknown number of people suffered from heat stress, heat exhaustion, or dehydration, as reported by hospital emergency rooms.

Excessive Heat in BON HOMME, SOUTH DAKOTA
From 10-JUN-16 11:00:00 to 12-JUN-16 18:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Official NWS Observations

Temperatures reaching daytime highs of 95 to 100 after a period of cool weather were accompanied by humid conditions, with the heat index rising to a little above 100 degrees. An unknown number of people suffered from heat stress, heat exhaustion, or dehydration, as reported by hospital emergency rooms.

Excessive Heat in YANKTON, SOUTH DAKOTA
From 10-JUN-16 11:00:00 to 12-JUN-16 18:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Official NWS Observations

Temperatures reaching daytime highs of 95 to 100 after a period of cool weather were accompanied by humid conditions, with the heat index rising to a little above 100 degrees. An unknown number of people suffered from heat stress, heat exhaustion, or dehydration, as reported by hospital emergency rooms.

Excessive Heat in TURNER, SOUTH DAKOTA
From 10-JUN-16 11:00:00 to 12-JUN-16 18:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Official NWS Observations

Temperatures reaching daytime highs of 95 to 100 after a period of cool weather were accompanied by humid conditions, with the heat index rising to a little above 100 degrees. An unknown number of people suffered from heat stress, heat exhaustion, or dehydration, as reported by hospital emergency rooms.