What did this quick freeze do to your yard?

This quick freeze will only hurt your plants and turf if they have not hardned off. If your area had warm weather like the NW did this last month, the plants were still transpiring and a quick freeze did do some frost burn. This will include the elongation of the stems, evergreen foil edges. There isn't anything you can do at this time to correct the problem other than wait until spring and restore the health of the plant. Turf blades that are frozen can break when they are driven over by heavy weighted vehicles. If the snow came down and blanketed the grass before the deep freeze you will find the grass has spring and bendable under the snow. But if the grass was frozen quickly it will be stiff and break off. If your tree pruning service comes in and drives on that grass it will break and be brown in the spring. Grass is resilient and will recover within a month or two after the spring thaw as the new blade grows. But if you do not want that look in the spring, keep the heavy trucks off of it. Often the tree company will put plywood down and tell you this will prevent that, it will help by distributing the weight but it still depends on how frozen the grass blade was.