Over 870 houses have been damaged in Nuwara Eliya, Badulla, Ratnapura, Monaragala and Matale districts.due to strong winds, Gale force winds have wreaked havoc in Uva Paranagama, Haldummulla, Welimada, Haputale and Bandarawela Divisional Secretariat areas and Measures have also been taken to provide relief to the affected people, the Disaster Management Centre sources said.