1. A method comprising: providing, by a client device, navigational information of a client vehicle solely to a first server, the navigational information being used by the first server to provide information identifying the client device to a second server when the client device is within a particular range of an emergency responder vehicle; receiving, by the client device, an emergency vehicle message solely from the second server when the client device is within the particular range of the emergency responder vehicle, the emergency vehicle message including navigational information of the emergency responder vehicle, and the first server being different from the second server; determining, by the client device, whether a particular mode of the client device is activated; determining, by the client device, updated navigational information of the client vehicle when the particular mode of the client device is activated; determining, by the client device, whether the emergency responder vehicle is projected to intersect with the client vehicle based on the emergency vehicle message and the updated navigational information of the client vehicle; and providing, by the client device, an alert signal to a user of the client device when the emergency responder vehicle is projected to intersect with the client vehicle.