10 degrees outside will freeze pipes with water inside and cause them to break. Make sure you turn off your main water supply.
A pipe break with the water turned off is a relatively small clean up.
If the main turnoff is inside your house a break could occur before the break and could cause a lot of flooding.
A 30 degree temperature would probably not cause pipe breaks.
To keep warm wear lots of clothes and have several blankets when sleeping.
It’s probably too late to buy heaters and/or generators before the power comes back on.
Good luck.
“If the main turnoff is inside your house a break could occur before the break and could cause a lot of flooding.”
Good point, thanks much.