Stronger storms mean new 'category six' scale may be needed

Traditional scale used goes only to five but strength and intensity of storms is increasing, says scientists

The increasing strength, intensity and duration of tropical cyclones has climate scientists asking whether a new classification needs to be created: a category-six storm.

The Saffir-Simpson hurricane wind scale currently runs in severity from one to five, with five describing near-total destruction.

Related: Asian typhoons becoming more intense, study finds