It has been a warmer February day, but high only hit 68, so what could cause a water leak under the car?

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I went out to my car after being parked at a friend's house for a couple of hours. There was a water stain in the driveway, not puddling, but definitely there. I drove home and looked underneath. I didn't see anything leaking. No lights, or issues on the inside with the temperature gauge. I didn't have the air on. I let the car sit in my driveway and went back out in an hour and I have a water stain, starting to puddle, and I can see a drip of water come down about every 3-4 seconds. The drip is towards the front, closer to the passenger side. What could the cause be and do I need to get it into my mechanic right away?

My car has 211000 miles.
My car has an automatic transmission.

Hi there. The leak seems to be coming from the windshield washer reservoir. Look under the vehicle with a flashlight and on the washer reservoir tank and see if there is water droplets coming off of it. If so, then the reservoir may have a crack in it and it would need replaced. If you need further assistance with a water leak under your car, then seek out a professional, such as one from Your Mechanic, to help you.

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