these should be incorporated into warning chains both to take advantage of their reach and to ensure that they do not spread inaccurate or exaggerated information in two projects supported by the escap trust fund for tsunami disaster and climate preparedness the asiapacific broadcasting union has developed guidelines and other warning tools for broadcasters however in order to be effective in an emergency the broadcast media need a formal role in the warning chain established through sops rather than let misinformation pass unchallenged the authorities are usually better off monitoring the social media and themselves using these platforms to reach the public with the correct information