Power steering fluid

It was a cold winter day today.  I hate having to go out in this weather but I had to go to the bank. So I started up the car and I noticed a sound coming from under the hood. I opened it up to see that the power steering fluid was running low. I didn't have any power steering fluid at home so I was hoping to get lucky enough to make it to the gas station before the pump stop working. Lucky for me the gas station is only five minutes away. I turned the key off quickly as a I pulled in bought some fluid filled it up and now the squeak is gone. I feel lucky.