24 Aug 2011

Hurricane Irene strengthening

2:56 pm on 24 August 2011

Hurricane Irene is growing in strength and is expected to become a Category 4 hurricane.

It has swept over Puerto Rico and the Dominican Republic, and is heading towards Haiti, the Turks and Caicos Islands, and the Bahamas.

The storm is expected to make landfall this weekend, and could affect the entire eastern coast of the United States.