While it is true that forest fires are destructive, they are also one of nature's ways to keep a forest healthy. The forest is naturally thinned by the burning off of unhealthy and dead trees, this also promotes new growth. The problems occur when you add humans to the mix. Houses and structures that have been built in or close to a forest must be protected, so Fire Fighters are given the task of controlling and limiting the extent of the fires. This has the unfortunate side effect of creating an unhealthy forest, but as long as people are allowed to build in or near the forest this is something that must be dealt with.
Forest Fires can happen at anytime of the year in the San Bernardino National Forest but usually occur in the Summer and Fall. Most of these fires are human caused, either by accident or by intent. Though most are relatively small and quickly controlled, under the right conditions some become devastating fire storms.
The month of October is especially vulnerable to large fires and has become a time of heightened anxiety among the residents of the forest. It is during this month, as the seasons transition between Summer and Winter, that we normally get the Santa Ana Winds (North Winds). These winds can have a sustained wind speed of 40-50 MPH with gusts of 60-70 MPH (even higher through some of the canyons). These winds can quickly turn a 2-3 acre fire into a 1,000 acre fire in a few short hours.
Some Recent Large Forest Fires in the San Bernardino National Forest
2003
Old Fire
91,281 acres
993 homes destroyed
Grand Prix Fire
59,448 acres
135 homes destroyed
(Note: The Grand Prix and Old Fire merged; The Grand Prix Fire crossed into the Angeles National Forest and became known as the Padua Fire in that area. Both fires also burned large areas outside the national forest boundaries. The totals include all areas burned.)
2006
Heart/Millard Complex Fire
25,000 acres
0 homes destroyed
(The word "Complex" means that the named fire is actually made up of multiple fires. The Heart/Millard Fire merged with another fire, the Sawtooth Complex Fire and became known collectively as the Heart/Millard/Sawtooth Complex Fire. Together these fires burned an approximate total of 90,000 acres, though most was not within the national forest boundaries. A total of 58 homes were destroyed)
2007
Butler II Fire
14,039 acres
0 homes destroyed
Slide Fire
12,759 acres
272 homes destroyed
Grass Valley Fire
1,247 acres
174 homes destroyed
2009
Sheep Fire
7,128 acres
1 home destroyed