Climate droughts threaten renewable energy reliability globally

⚡ AI Executive Summary

A comprehensive review examines how extreme weather and climate variability create production shortfalls across solar, wind, and hydropower systems worldwide, with regional hotspots showing severe vulnerability. Winter wind droughts in Europe can slash output by half, while China faces extended autumn wind shortages and winter solar deficits affecting grid stability. Researchers stress that these renewable-energy droughts will intensify under higher-emission scenarios, requiring integrated planning and resilience strategies. For utilities and grid operators, this synthesis highlights a critical gap in current climate-resilience planning: single-technology or regional assessments miss compound risks that emerge when multiple renewable sources underperform simultaneously. The findings underscore why hybrid renewable portfolios, expanded storage capacity, and stronger cross-border transmission interconnections are not optional upgrades but essential infrastructure for maintaining grid reliability in a net-zero system. Energy professionals must incorporate standardized drought-risk metrics and climate projections into long-term resource adequacy planning to avoid cascading failures during extreme events.