Warning is a dangerous profession. The National Intelligence Council is the premier organization in the government
(USG) responsible for bringing together intelligence and information from every source imaginable, integrating it into a single product, and then disseminating it to the senior leadership of the nation, such as the president, selected members of the cabinet, the NSC, the joint chiefs, and a few others.
Put yourself in the position of one who is responsible for providing warning, whether at the national level, within a military unit, at county government, and so on. Think about having to tolerate the reaction of some minor elected official who scoffs at your advice and counsel, takes no action whatsoever, and the tragic event occurs costing loss of life and property. Or, the same official accepts your warning, takes action at significant financial and political risk, and the event does not occur.
As with risk, discuss why warning is so important, and explain the consequences of warning, or the lack thereof, and the issues discussed above.