If any such nonconforming use of land or use of land and structures in combination ceases or is abandoned for any reason, including destruction of buildings, for a period of at least one year, any subsequent use of such land, or land and structures in combination, shall conform to the regulations for the zoning district where such land is located, except that, where a hardship to the operator of the nonconforming use clearly exists as a result of financial, health or other calamity, the Zoning Hearing Board may grant an extension of the one-year limit consistent with the hardship, but not more than one additional year.