Methods, systems, and apparatus, including computer programs encoded on a storage device, for monitoring a property are disclosed. A monitoring system includes one or more processors and one or more computer storage media storing instructions that are operable, when executed by the one or more processors, to cause the one or more processors to perform operations comprising: obtaining sensor data from sensors at a property; determining, for a peril, a risk that the peril will occur at the property based on risk factors determined from the sensor data; selecting a particular risk factor from the risk factors based on the risk that the peril will occur at the property; and providing an indication of the particular risk factor.