What Is Wildfire Season — And Is It Expanding?
Wildfire season traditionally referred to the summer fire weather window — typically July through September in western states, with a separate spring window in the Southeast. Over the past decade, both windows have expanded. Western states now see significant fire activity from May through November in most years. The Southeast sees dangerous conditions from February through April and increasingly in October–November as fall droughts worsen.
What this means practically: the window where outdoor burning is safe and legal is shrinking, while the volume of vegetation homeowners need to burn (more storm damage, more drought-killed trees, more overgrown land) is increasing. Navigating this requires more careful timing than it did a generation ago.
How Burning Rules Change During High-Risk Periods
During elevated fire risk periods, several layers of restriction apply on top of normal permit requirements:
1. Fire Danger Ratings Affect Permit Issuance
Most state forestry systems tie permit availability to daily fire danger ratings. When the National Fire Danger Rating System shows:
- Low / Moderate: Normal permit process applies
- High: Permits may still be issued with stricter conditions
- Very High: Most states will not issue permits. Georgia's GFC system automatically denies permits at Very High.
- Extreme: No permits issued anywhere. Active fire suppression resources are fully deployed.
2. Fire Restrictions (Western States)
Western states use a tiered fire restriction system that applies to all public and private land:
- Normal conditions: Standard permit rules apply
- Stage 1 / Level 1: Open burning prohibited; campfires may still be allowed in fire rings
- Stage 2 / Level 2: All open fires prohibited including campfires in most areas
- Emergency / Level 3: All ignition sources prohibited outdoors in extreme cases
Check cofirebans.us (Colorado), nmfireinfo.com (New Mexico), inciweb.nwcg.gov (nationwide), or your state's equivalent before any outdoor burning from May through November.
3. County Burn Bans
In Texas, Oklahoma, and other Plains and Southern states, county judges issue burn bans independently of state-level restrictions. A county can be under a burn ban even when the broader state is not at elevated restriction. Check county-specific ban maps before burning in these states.
Can I Burn Anything During Wildfire Season?
During elevated fire danger (but not during active burn bans or Very High / Extreme fire danger):
- Small recreational fires in permanent, enclosed fire rings may still be permitted (check local restrictions)
- Charcoal or gas grills are almost always exempt from fire restrictions
- Propane and natural gas outdoor heaters are typically exempt
- Open burning of vegetation (yard debris, brush): usually restricted or prohibited during elevated fire danger
When Is It Genuinely Safe to Burn During Extended Fire Seasons
Even if conditions technically permit a burn, consider these factors before proceeding during fire season:
- Relative humidity above 40%: Below 25% is extremely dangerous. At 15% or lower (common in western states during summer), even a small fire can produce ember cast that travels hundreds of feet.
- Wind speed under 10 mph, consistent direction: Gusty or shifting winds are dangerous regardless of average speed. Wind shifts mid-burn have caused thousands of escaped fires.
- Green live fuel in the surrounding landscape: If the grass and brush around your pile is brown and cured, embers from your burn have highly receptive fuel to land in. Green grass is your buffer.
- Fire weather watch or Red Flag Warning absent: These NWS products specifically flag dangerous combinations of wind, humidity, and fuel moisture. Treat any fire weather alert as a hard prohibition.
The permit tells you whether the state authorizes your burn. Fire weather data tells you whether it's wise. Both matter — but in severe fire conditions, wisdom overrides authorization.
Frequently Asked Questions
It varies significantly. Western states (CA, OR, WA, ID, MT, CO): fire season typically runs June–October but has expanded to May–November in recent years. Southeast (GA, FL, NC, VA, TN): spring fire season February–April is most critical, with a secondary fall window. Plains states (TX, OK, KS): year-round risk based on drought. Check your state forestry commission's fire weather page for current conditions.
Rain significantly reduces fire risk, but how much depends on how much rain and the soil/fuel moisture. A quarter-inch rain on severely drought-stressed fuels doesn't meaningfully reduce risk. An inch or more of rain, followed by grass greening up, substantially reduces fire danger. Check the fire danger rating after rain events — state forestry systems update these ratings daily.
Having a permit is the legal requirement — but your permit will not be issued if fire danger is Very High or Extreme. Even at High fire danger, burning during drought requires exceptional caution: conditions change rapidly, your pile's embers can travel further in dry air, and any escape will find extremely receptive fuel. If in doubt during drought conditions, postpone the burn.