Hewes graduated from the University of Toronto in 1944 with degree in occupational therapy.
She was an Alderwoman in the City of Edmonton from 1974 until 1984. From 1964 to 1967, she was the Executive Director of the Canadian Mental Health Association, Director of the Edmonton Social Planning Council From 1967 to 1974, and Chairman of the Board of Canadian National Railway from 1984 to 1985 (first woman to chair the board of CN).
Hewes was elected as a Liberal Member of the Legislative Assembly (MLA) for Edmonton-Gold Bar in the 1986 Alberta provincial election, and re-elected in the 1989, and 1993 provincial elections. In 1993, she received over 10,000 votes in Edmonton-Gold Bar, the largest vote of any candidate running in that election. She did not run for re-election in the 1997 election. In 1994, Hewes served as the Interim Leader of the Alberta Liberal Party.
- "Biographies of Mayors and Councillors". Edmonton Public Library. Retrieved January 26, 2005.
|MLA Edmonton-Gold Bar