History has clearly demonstrated that Southern California wildfires are more likely to occur and more likely to spread when strong winds are accompanied by low humidity levels and high temperatures.
If the wind speeds are sufficient (25 mph or more) and the humidity levels low enough (less than 15%), this potentially dangerous combination actually prompts an official readiness response called the “Red Flag Program.”
Red Flag conditions typically have four progressive stages that are intended to reduce response time to absolute minimums. However, please note that, Stage IV (Cancellation) may occur at any time.
- STAGE I: Fire Weather Watch –
usually 48 to 72 hours in advance of a Red Flag Alert.
- STAGE II: Red Flag Warning –
usually 24 hours in advance of a Red Flag Alert.
- STAGE III: Red Flag Alert
- STAGE IV: Cancellation