Italian officials sounded an alarm Wednesday over climate change due to the threat that a fast-moving melting glacier is posing to a picturesque valley near the Alpine town of Courmayeur. Courmayeur mayor Stefano Miserocchi closed down a mountain road and banned access to part of the Val Ferret, a popular hiking area outside of town on the southern side of the Mont Blanc massif. Those moves came after experts warned that a 250,000-cubic-meter mass of the Planpincieux glacier was at risk of collapsing.