Water pipes are frozen anyone know how to get the water flowing again?

Blow dryer

Yup, a blow dryer, rags wrung out in hot water, you can also buy Electric Heat cable that wraps around the pipes and plugs in the wall that will heat up the pipe safely( $20 and up at Walmart). This can be used to defrost a frozen pipe but also to keep it from freezing again.

In the meantime, to defrost: https://www.wikihow.com/Unfreeze-Water-Pipes

Open cabinet doors so heat from house will get in..may take a while..turn on faucet so it will start to thaw and drip.

Heat gun, more powerful than a hairdryer.I bought my heat gun @ Harbor Freight for $8.00.

Try a hairdryer

turn faucet on low, apply heating pads on high, move as needed, this will not potentially cause a fire. When water begins to flow keep it running and continue moving the heating pad until the water flows freely. Keep the faucet open a .

its probably frozen where the cold water comes in from the street at the shut off valve in the basement , unfortunate you need to see the cold water line that's probably behind the drywall or paneling after the shut off valve , if its an older home there is probably no insulation in the wall. you need to add heat on the pipe from the shut off valve into the house. turn on the cold water tap closest to the shut off valve , a good hair dryer or heat gun works , it may take a while . you may need to cut a 6 inch opening in the drywall to get the heat in the area . use a utility knife and take it slow as not to cut anything else behind the wall, after the water starts keep the heat on till the water flows normal , you then need to insulate the pipe on that wall. In winter you need to keep a tap running a drip when freezing temps drop.

Barry Smith gave a great answer. I woke up this a.m. with frozen water pipes ( happened once before about 10 yrs. ago ) even though I'd left two faucets dripping, one I let water 'stream' not just drip. Main water valve is just under house, thankfully I know where it is. It was securely wrapped with thermal 'tape' and insulation. To no avail. Got my hair-dryer, applied heat directly to main valve & pipe for approx. 20 mins. Have water again. I then re-wrapped thermal tape around what I could. Praying for frigid temps to end! Best of Luck!