Hurricane Kiko has pushed Hawaii into a state of emergency as the powerful storm churns across the Central Pacific. Once a Category 4 monster, Kiko has weakened slightly but still threatens the islands with life-threatening surf, dangerous rip currents, and flooding rains. Acting Governor Sylvia Luke has mobilized the National Guard as forecasters warn of massive waves and coastal flooding. Why did Hurricane Kiko form and what caused this dangerous storm? Take a look.