There's more than one place called '''West Coast''':
'''West Coast''' - the province of British Columbia
West Coast (New Zealand) - the western coast of South Island (New Zealand) (including the districts of Buller and Westland) but '''''excluding''''' the western coast of North Island (New Zealand)
West Coast (South Africa) - in the Western Cape and Northern Cape
'''West Coast''' - consisting of California and the Pacific Northwest (United States of America)