Emissions in pellet storages caused by the autooxidation of lipids have a negative impact on human health and lead to unpleasant odors. This study investigates (1) the emissions of softwood flakes during temperature treatments (150 degrees C-240 degrees C), (2) the online monitoring of these emissions with gas sensors, (3) the impact of the thermal treatments on the lipid content in the flakes and (4) the correlation between the lipid content and the storage emissions. The results show a correlation between the temperature during the treatment, the alpha-pinene, furfural, and 2-methoxyphenol emissions, and the gas sensor response. The decrease of the lipid content is correlated to a decrease in storage emissions, especially hexanal and carbon monoxide. It is discussed if higher drying temperatures during pellet production can reduce the storage emissions of the pellets. The increasing fire risk in the dryer could be controlled by the gas sensors.