Presently, many isolated pine rockland sites throughout Miami-Dade County and the lower Keys suffer from fire suppression, leading to drastically altered plant compositions.[26] It is estimated that around 5,000,000 ha of pine rocklands burned in 1926, whereas only 76,486 ha burned in 1995 and 2003.[27] Most sites located in Miami-Dade County and the lower Keys are located near residential or commercial lots and are often unable to implement prescribed burns.[28] The longer fire is suppressed, the harder and more dangerous it is to prescribe effective burns. Fuel loads increase between fires and result in hotter and higher flames.[26] Fires that are too high or intense can result in crown fire or mortality at all levels of the canopy, including below ground biomass.[10] Frequent fire is used to great effect in the Long Pine Key in Everglades National Park.