The National Weather Service has put Boulder County on high alert for Monday, March 30, issuing a Red Flag Warning that sharply raises the risk of fast-moving wildfires across the plains and foothills. County officials say gusty winds, low humidity and warm temperatures could turn even a small blaze into a fast-spreading fire. Residents are being urged to hold off on any outdoor burning and to secure yard debris, equipment and vehicles that could accidentally start or fuel a fire.
In a brief March 29 video, the Boulder County Sheriff's Office amplified the NWS alert and stressed that "open burning, including agricultural burning, is prohibited" on Monday. Boulder County's burn guidance makes it clear that no open burning is allowed during National Weather Service fire-weather alerts and explains how registration and notification work for permitted burns, Boulder County says. Officials are asking farmers and land managers to cancel any planned burns and to contact the Sheriff's Office if they have already registered a burn.
What the warning means for Boulder County
Red Flag Warnings go out when strong winds, very low humidity and warm temperatures line up to create conditions ripe for rapid fire spread. According to the National Weather Service Denver/Boulder, that combo means a single spark can quickly become a large, fast-moving fire, and people should steer clear of any activity that might ignite flames.
What's prohibited and legal risks
Boulder County's guidance says open burning, including broadcast burns, pile burns and many agricultural burns, is off-limits during Red Flag Warnings. People also must notify the county before any planned burn, according to Boulder County. County Ordinance 2023-1 outlines penalties and liability, including civil fines for violations and responsibility for any fire-response costs that result from prohibited burns, the ordinance shows. If you already have a registered agricultural burn, you are expected to cancel it for the day and notify the Sheriff's Office through the county's open-burning portal or by phone.
How this fits into a broader trend
Colorado has already logged an unusually high number of Red Flag days in 2026, with the NWS Boulder office issuing a historic run of warnings in January and February, a pattern that has officials on edge as snowpack stays low and drought lingers, Denver7 reports. That backdrop helps explain why county agencies are taking a strict no-burn stance for this particular alert day.
Where to get updates
For the latest forecast and any changes to the warning, residents can check the National Weather Service Denver/Boulder Red Flag products and sign up for county emergency alerts through BoCoAlert to receive texts and emails. If you are unsure whether a planned activity is allowed, officials say you should contact Boulder County Fire Management or the Sheriff's Office before lighting anything.
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