import type { WbgtInput, WbgtResult } from './types.js';
/**
 * Calculate Wet Bulb Globe Temperature (WBGT) index
 *
 * Outdoor (with solar load):
 *   WBGT = 0.7 x Twb + 0.2 x Tg + 0.1 x Ta
 *
 * Indoor (or outdoor without solar load):
 *   WBGT = 0.7 x Twb + 0.3 x Tg
 *
 * Where:
 * - Twb = Natural Wet Bulb Temperature (C)
 * - Tg = Globe Temperature (C)
 * - Ta = Dry Bulb / Air Temperature (C)
 *
 * The weightings are those of the index itself, not a choice made here.
 *
 * @reference ISO 7243:2017, WBGT index for the assessment of heat stress.
 *
 * Status is determined by comparing WBGT to threshold:
 * - safe: WBGT < threshold - 2
 * - caution: threshold - 2 <= WBGT <= threshold
 * - danger: WBGT > threshold
 *
 * The 2 degree caution band is a margin chosen here, not part of the index, and the
 * threshold it is measured from is itself unverified - see WBGT_THRESHOLDS above.
 *
 * @param input - WBGT input parameters
 * @returns WBGT result with index, threshold, and status
 */
export declare function wbgtCalculate(input: WbgtInput): WbgtResult;
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