The water won't be off for longer than it needs to be and if you know where the men are working why not ask them or alternatively call the water company. The number should be on your water bill.

If the water is going to be off much longer the water company should make alternative arrangements, such as bringing a water bowser or fitting a stand pipe in your street - in that case you should ensure drinking water is boiled or treated with puritabs or similar. This also applies to your supply for about 3 days after it has been restored.
You might find bottled water is more convenient...