n recent years, in the midst of drought and water crisis that has affected several regions of Brazil, in particular the semi-arid region, surface water reserves have been constantly monitored. In this context, the objective of this study was to map and analyze, through Remote Sensing, the dynamics of the water mirrors of the main reservoirs in Ceará, in order to show how the area of the water mirrors of the reservoirs were affected by the precipitations below of the average during the last six years of drought, comprising the years 2012 to 2017. For this, the Google Earth Engine platform was used to analyze Landsat images, comprising the interannual period from 2012 to 2017. For the delimitation of the waters, an enhancement technique was used to convert the RGB images to HVS, creating a panchromatic image and facilitating the process of identifying the water mirrors. Thus, the results indicated that all reservoirs lost area, where some even dried up completely. The results also suggest that the reservoirs located in the hydrographic basins of the wetter climate showed less loss of area compared to those of the drier climate. Due to the high number of reservoirs, the use of satellite images and Remote Sensing techniques are essential to measure the effects of drought on dams. Such information is extremely important for the planning and environmental management of water resources, from the perspective of promoting supply policies and, with this, expanding the capacity to face problems related to water security.