A method for managing alerts relating to the detection of a local phenomenon in a communications network. The communications network includes at least one first residential gateway capable of transmitting alert messages in the network. The local phenomenon is likely to degrade the hardware and/or software resources of the residential gateway. The method includes: detection, by the first residential gateway, of a degradation linked to the local phenomenon; transmission of an alert message in the network by the first residential home gateway, in order for at least one second residential gateway able to receive the alert message, adjacent to the first residential gateway in the wide area network, to respond to the local phenomenon.