In 2004, Lucas served as a spokesperson for the Australian National Breast Cancer Foundation and provided support to many organisations, including World Vision as of 2009, The Humour Foundation as of 2004, Oxfam Community Aid Abroad as of 2006, Global Green Plan as of 2009, Save the Whales Again as of 2010 and Sea Shepherd as of 2012. In 2010, Lucas and the Summit on the Summit team climbed to the top of Mount Kilimanjaro to raise awareness of the global clean water crisis. In 2020 she has questioned the 5G network and any potential health effects related to it.