A method includes receiving first sensor data representing information collected, during a first time period, by a sensor located on or in a vehicle configured to sense an environment external to the vehicle, storing the data in a memory, processing the data to determine a first set of one or more characteristics of the external environment, and determining, based on the first set of characteristics, a first risk indicator representing a risk of loss during the first time period. The method also includes receiving second sensor data representing information collected, during a second time period, by the sensor, storing the data in the memory, and processing the data to determine a second set of one or more characteristics of the external environment. The method also includes determining, based on the second set of characteristics, a second risk indicator representing a risk of loss during the second time period.