But how could the survivors believe it was natural? Everywhere they looked nearly every thing was destroyed. All of the city’s hospitals, 75% of its factories and buildings and 90% of its homes were gone. Bricks covered the ground like red autumn leaves. No wind, however, could blow them away. Two dams fell and most of the bridges also fell or were not safe for traveling. The railway tracks were now useless pieces of steel. Tens of thousands of cows would never give milk again. Half a million pigs and millions of chickens were dead. Sand now filled the wells instead of water. People were shocked. Then, later that afternoon, another big quake which was almost as strong as the first one shook Tangshan. Some of the rescue workers and doctors were trapped under the ruins. More buildings fell down. Water, food, and electricity were hard to get. People began to wonder how long the disaster would last.