The fire season in the southern Amazon runs from June to November, with peak burning activity in September along the eastern and southern Amazon forest frontiers, a swath sometimes referred to as the "arc of deforestation". Year-to-year variability in fires is strongly linked to climate anomalies, and both the El Niño Southern Oscillation in the Pacific Ocean and Atlantic Multi-decadal Oscillation influence drought conditions and the risk of fires across the southern Amazon.
2019 Fire Season Updates:
August 24th, 2019
Figure: Cumulative active fire detections through 8/22/2019 from MODIS and VIIRS confirm that 2019 is the highest fire year since 2012 (the start of the VIIRS record) across the seven states that comprise the Brazilian Amazon. In addition, fires in 2019 are more intense than previous years, measured in terms of fire radiative power, consistent with the observed increase in deforestation 
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