In order to determine if the property you are looking at is in a flood zone, scroll down on the property page to the “Property Hazards” container.

There it will tell you whether or not the property is in a flood zone. If you are unfamiliar with the flood zone terminology, there is a “Flood Zone Definition” button in that same container.

You can also enable the "FEMA Flood Layer" on our street map. It's located under Layers--> Flood