Google announced a new layer of data being added to Google Maps for public alerts. If there are emergency alerts in your area, Google will show them to you on the map, with more details on the alert.You can access it over at google.org/publicalerts.
The map will load with a layer of data on top of it. You can search by location to see if there are any alerts in your area or just browse the alerts on the left hand side or on the map. The information is also available directly on Google Maps when you search for events in a location, such as [tornadoes in texas].