In his book Heat, the Sydney-based photographer Paul Blackmore pays homage to Australia’s obsession with the coast, exploring the relationship between water, heat and humanity. He documents the pursuit of individual freedom on crowded beaches during sweltering summer days and shoots the sea in its various guises – cool, dark and icy; a powerful force to be reckoned with; a backdrop to foggy Bondi mornings; and a stormy refuge for the wild at heart