Today I went for a short ride near yesterday's small-ish brush fire. Crews were mopping up hot spots but I saw no open flame, just some smoldering. At one point the fire jumped the freeway and the parallel 4 lane highway and lit up a group of oak trees. There were at least 30 men there working to cut apart these old oaks to extinguish them. Once the fire gets into the trees it can burn into the roots and flare up days later.