I would have to go with droughts. You have warning prior to a hurricane, people can evacuate the area and you can rebuild after what ever destruction it may leave behind. Droughts are affecting parts of the world as I type this. People are dying. Droughts cause us to lose crop, farm animals, allow for damaging dust storms, water shortages, and they can last for extended periods of time.
I could probably come up with more shit but I'm still sleepy. :(