Sioux Falls, South Dakota – Elevated to high grassland fire danger is expected today across areas south of Interstate 90, as warm temperatures, low humidity, and gusty winds combine to create hazardous outdoor conditions.
According to the U.S. National Weather Service in Sioux Falls, well above normal temperatures and falling relative humidity levels will significantly increase the risk of grass fires, particularly during the late morning and afternoon hours. Southwest to west winds are forecast to become breezy, further raising the potential for rapid fire spread if ignitions occur.
The highest fire danger is expected across southeastern South Dakota, northwest Iowa, and portions of southwest Minnesota, including communities along I-29, I-90, and U.S. 81. Areas near Sioux Falls, Yankton, Mitchell, Sioux City, and Worthington are all included in the elevated risk zone identified by forecasters.
Grassland Fire Danger Index values indicate conditions ranging from high to very high south of I-90, where cured grasses and dry fuels remain exposed following recent snowmelt. Even small ignition sources such as discarded cigarettes, sparks from equipment, or debris pile burning could quickly lead to uncontrolled grass fires.
The National Weather Service is urging residents to use extreme caution outdoors today. Officials recommend avoiding debris burning, properly extinguishing smoking materials, and securing tow chains or equipment that could create sparks along roadways.
Motorists traveling along I-90 and I-29 should be alert for sudden reductions in visibility if grass fires develop near highways, as smoke can move rapidly with changing winds. Emergency response agencies may also face increased call volumes if multiple fires ignite.
Conditions are expected to improve later this evening as winds weaken and humidity levels recover. Until then, residents, farmers, and commuters—especially young workers operating machinery outdoors—are encouraged to remain fire-aware and report any signs of fire immediately.
