I'm in Austin, Texas and my Sago went through a few freezes and is now brown all over. I'm hoping it's not dead. It's about 8 years old and stands 4 feet tall. The new growth on the top has curled brown stalks as well. I've never seen them curl before.
Certified GKH Gardening Expert
You will need to remove the yellow and brown fronds this spring, but only those, as they will not come back. Just use sharp shears to do so. Do not remove green parts of fronds. These articles will help you as well: