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The variables represented are drought factor (DF), relative humidity (RH), temperature (T) and wind speed (v). This empirical index is valid for the Southeastern forest ecosystem of Australia. In this wildfire-prone ecosystem, the eucalyptus is the dominant vegetation. On the other side of the world, Latin-America —including Ecuador— experienced a massive introduction of this specie \cite{Anchaluisa2013}. Thus, is reasonable to expect that this index may represent the Ecuadorian wildfire potential.   The application of this index with weather station and reanalysis data yielded daily values. With weather station data the calculation comprised the period 1997-2012. The bias-corrected reanalysis data allowed to extend the method for the period 1963-2012. For each year, a sum of the daily FFDI values provided a seasonal metric of wildfire potential. This cumulative FFDI corresponds to the wildfire season July-August-September (JAS). Finally, we calculated the 85th 90th  percentile on the seasonal FFDI time series. This determined which were extreme wildfire seasons during the period 1963-2012. \subsubsection{Investigation of ENSO influence over wildfire seasons}