The occurrence of season fires varies as a function of climatic differences. For example, Florida wildfires are common during the winter because it is relatively dry at that time, whereas summers are moist and often unsuitable for burning. Monsoon environments such as in the Southwestern US have fires concentrated in late spring and early summer because fuels are dry and the arriving monsoon storms provide a ready source of ignitions. In contrast the bulk of burning in Mediterranean-climate California tends to be in the late summer and early fall after a very extended drought of 6 months or more. Today humans have the potential of igniting fires out of the natural fire season and can alter ecosystems by increasing the length of the fire season and frequency of burning. Sometimes natural recovery processes are compromised by out-of-season burning.
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