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The risk of widespread forest ® re has been assessed from information supplied by the AVHRR sensor onboard NOAA satellites, for the area of the Autonomous Community of Valencia in eastern Spain, where several major forest ® res occurred in the summer of 1994. The burnt surface data were obtained through unsupervised classi® cation of the spectral information of the forest areas, ® rst, from a date previous to the forest ® re; and second, from a date following the ® re. The methodology for the forest ® re risk evaluation is based on the temporal evolution of the NDVI weekly maximum value. Actual forest ® res appear to be statistically correlated with the deduced high risk forest ® re areas.

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