Educated guess at what may have happened...

Your water meter probably froze. There is a freeze plate on the bottom of it and when water in the meter freezes it expands to prevent damage to the water itself. This makes it a cheap and fairly easy repair. The bad thing is that when it thaws out you're still not going to have water as the plate is a single use part that breaks when it freezes. There will be a big leak at the meter and your street will be flooded with water coming from your meter. Which will turn to ice tonight.

I would try to find a water meter key and place it ready to turn off the water. Take a hair dryer to the meter to thaw it out. If it starts gushing water turn your water off and file a 311 request for a broken freeze plate / no water. You'll have to go a few days without water before it is fixed.

Also possible, but less likely - you have a frozen pipe inside the house. This can turn into a catastrophe if you don't catch it quick. Try to inspect the plumbing where it enters the house. Does any of it look cracked? If so, you need to turn off the water with the aforementioned key and it's your problem to resolve, not 311's.

If you cannot locate a key you can use a wrench. Just have it pre-positioned prior to dethawing the meter because the area around the meter will be flooded with freezing cold water and you'll have to stick your hand in it to shut it off.

EDIT: Just saw you're a renter. Not your responsibility but your problem for sure. I would not mess around with this, inform your landlord.