Coal India, the world’s biggest miner of the fuel, reported the lowest production and shipments in three years after heavy rains flooded its mines. Coal production in August dropped 10.4% from a year ago to 32.4-million metric tons and shipments declined 9.6% to 36.72-million tons, both plunging to the lowest since the same month in 2013. Rains and local agitations cut output by 2.4-million tons, N. Kumar, technical director at the miner, said Wednesday.