import type { Coordinates, SourceResult, TsunamiData } from '../types/index.js';
/**
 * NOAA Tsunami Warning Center — active tsunami advisories.
 * Parses the CAP/Atom feed from tsunami.gov.
 * No API key required.
 */
export declare function fetchNoaaTsunami(_coords: Coordinates): Promise<SourceResult<TsunamiData>>;