When did the earthquake start. Why was it impossible to use fire fighting equipment. What was the main factor causing the damage and death of most people

Almost a hundred thousand people were killed and half a million homes destroyed as a result of an earthquake in Tokyo in 1923. The earthquake began a minute before noon when the inhabitants of Tokyo were cooking their midday meals. Thousands of stoves were overturned as soon as the earth began to shake. As a result, small fires broke out everywhere and quickly spread. The fires engines were prevented from going to help because many of the roads had cracked open. It was impossible to use fire fighting equipment as most of the water pipes had burst. Consequently, over ninety percent of the damage was caused by fire rather than by the collapse of the buildings. Most of those who died were not killed in the earthquake itself but in the fires, which followed. If the earthquake had occurred at night while people were sleeping, far fewer would have died. 
Questions:

1. When did the earthquake start?
2. Why was it impossible to use fire fighting equipment?
3. What was the main factor causing the damage and death of most people?