Kamermayer successfully ensured that Hungarian entrepreneurs from Budapest and elsewhere were able to exhibit their products (for instance, Hungary's first steam locomotive by MÁVAG and ceramic works by Zsolnay Porcelain Manufacture) at the 1873 World's Fair in Vienna. He also initiated a visit to Budapest by the world exposition's international jury. As a result, Kamermayer was given the title of royal counselor by Francis Joseph on 8 December 1873. In 1875, 1876, and 1878 large storms coming from the Transdanubian region arrived in Central Hungary damaging several areas in Budapest. In the winter of 1876, icy flood waters swept away buildings and parts of the low wharves of Buda and Óbuda. Pest survived unharmed by the flood because of its existing drainage system. During the emergency, Kamermayer demonstrated his organizational and management abilities and in recognition of this was awarded the Order of the Iron Crown 3rd Class. He gave protection to refugees following the Occupation of Bosnia and Herzegovina in 1878, and also organized fundraising for the victims of the 1879 Great Flood in Szeged for which he received royal acknowledgment from Francis Joseph.