One of the most intense storms in world history has hit the Philippines. Typhoon Haiyan has already killed at least four people, injured several others and prompted millions to flee. President Benigno Aquino has warned the country faces “calamity.” With sustained winds of up to 199 miles per hour, it may be the most powerful storm ever to make landfall. On many islands, streets are flooded, communication is cut off, trees are down, and power is out. After battering the Philippines, Haiyan is on track to hit Vietnam and Laos over the weekend.