A red flag warning indicating critical fire danger conditions will be in effect until 4 a.m. Wednesday for mountains and inland valleys throughout San Diego County. “Relative humidity values below 10  percent combined with these strong winds will create critical fire  weather conditions on Tuesday,

Meanwhile, a "particularly dangerous situation" red flag warning is also in place from 10 p.m. Monday through 2 p.m. Tuesday in those same areas due to Santa Ana winds, low humidity and extremely dry vegetation.

The Santa Ana winds of Southern California can be visualized in several ways. You can see their effects as palm trees sway in the morning light or when clean-up crews arrive to deal with branches and debris on streets.