Turn on outside water features.
Open the faucets that are on pipes that might freeze. Note you want a very very slow drip. The problem is the pipe freezes and as the ice expands it puts pressure on the the pipe between the ice and the faucets. Thus opening the faucets a little can relive the pressure. Be sure to do both the hot and cold, not just one.
Do cover the outside faucets as mentioned above.
Probably drain the back flow on the sprinkler and cover it with insulation or at least a few towels. You will need to turn off the water to the sprinkler system.
If you get up to go to the bathroom you could run the water in areas you think you have a problem.
If you have a hot water circulating pump leave it on all night. But remember it may not reach all pipes.
I assume pipes in the garage will not get below 32 but that could be wrong tonight.
Detach hoses from outside faucets.
Note I am assuming we do not have substantial insulation in the outside walls for block homes. If you do then you should be ok for a lot of your plumbing.
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