Flag of Chilliwack, Canada The Flag of Chilliwack is the official flag representing the city located in British Columbia, Canada. Adopted on June 26, 1997, the flag features a white diagonal cross that divides the flag into four triangles. In each triangle, a different color represents one of the four local rivers: blue for the Vedder River, green for the Tallus River, red for the Fraser River, and yellow for the Harrison River. The flag symbolizes Chilliwack’s connection to its rivers and its geographical location at the confluence of these waterways.