Your house is spared structural damage, but the power and water are out. According to news reports, the grid is down in your area and several water mains are broken. Conservative estimates are that it will take crews at least a week to get water service back on.
The general rule of thumb is that you’ll need one gallon of water per person per day. Half a gallon is used for drinking and the other half is used for hygiene. That number will go up depending on a whole host of factors. If you live in a hot climate or have pregnant or nursing women in your group, you’ll want to store more water.