Sioux Falls, South Dakota – Wind gusts up to 40 mph and relative humidity dropping near 20 percent will create dangerous fire weather conditions along I-29 and I-90 from late Friday morning through 8 p.m.
A Red Flag Warning is in effect for portions of southeast South Dakota, northwest Iowa and northeast Nebraska as dry grasses and dormant fields combine with strong winds to support rapid wildfire spread. The most critical conditions are expected from late morning into early evening, when temperatures rise and humidity reaches its lowest levels.
Communities including Sioux Falls, Yankton, Mitchell and areas near Brookings will face the highest fire danger. Along Highway 81 and I-229, crosswinds may also impact high-profile vehicles while any roadside ignition could quickly spread through dry vegetation.
Officials strongly urge residents to avoid outdoor burning and to delay activities that could generate sparks. Equipment use in fields or near grassy ditches should be monitored carefully. Even a small spark from machinery or a discarded cigarette could ignite a fast-moving grass fire under these conditions.
Fire crews are prepared for rapid response, but strong winds could make containment difficult if a blaze develops. Smoke from any fires may reduce visibility on stretches of I-90 and rural highways, creating additional travel hazards.
Conditions are expected to gradually improve later this evening as winds ease and humidity begins to recover. Until then, residents across the Sioux Falls region should remain vigilant and report any signs of wildfire immediately to local authorities.
