April 21, 2026

Louisville under Red Flag Warning on Wednesday, April 22

The National Weather Service in Boulder has issued a Red Flag Warning in effect from 10 a.m until midnight on Wednesday, April 22 for an area including eastern Boulder County. Low relative humidity and strong, gusty winds will lead to critical fire weather conditions.

Stage 1 fire restrictions remain in effect in Louisville.

What you should do:

• No outdoor burning and avoid any activity that may produce a spark
• Have a go bag ready and be prepared for wildfires
• Be prepared for possible unplanned power outages. Xcel Energy (our power provider in Louisville) may be using Enhanced Powerline Safety Settings on Red Flag Days. Learn more about how to prepare for power outages on Boulder County's website. 

What is a Red Flag Warning?

The National Weather Service will issue a Red Flag Warning when there’s an increased risk of fire danger. A Red Flag Warning means that the conditions are right for the start or rapid spread of wildfires, and that extra precautions should be taken to prevent them. Low humidity, strong winds, and dry fuels pose an increased risk of fire danger, prompting heightened fire awareness and safety precautions.