The disclosure describes embodiments for to detecting a presence of a drowsy driver of a vehicle based on Vehicle-to-Everything (V2X) communications. In some embodiments, a method includes receiving, by a first connected vehicle, a V2X message including digital data describing a path history of a second connected vehicle. The method includes determining, by the first connected vehicle, that a driver of the second connected vehicle is drowsy based on the path history described by the digital data included in the V2X message. The method includes executing, by the first connected vehicle, a remedial action that is operable to modify an operation of the first connected vehicle based on the driver of the second connected vehicle being drowsy so that a risk created by the driver is reduced.