During World War I, Lady Amherst participated in projects to raise funds for various war works, including an exhibition of her own paintings of Egyptian scenes at the Dudley Galleries and a fundraiser at the Royal School of Needlework. Her son and heir, The Hon. Captain William Amherst Cecil was killed at the Battle of the Aisne on 16 September 1914. She was made an Officer of the Order of the British Empire (OBE) in 1919 for her charitable works with several governmental offices dealing with sanitation and health.