My Cleo at 5yrs did that on Jan 15 1978( I don't know, I have the scars to prove it)
I just remember the day. anyway a Doberman chased he up, she kept going higher as the night went on.
Finally at 2 am. I got an extension ladder and went up after her in a snowstorm. the wind was blowing
the snow was falling and the damn dog kept barking. I finally got a hold of her left foot and pulled. I shoved her in my coat and got her down. took her in the house and gave her warm icecream and tuna. she purred and snuggled with me. after that, she was inseperable from me. I still have the scar from her scratching me, she was soooo scared, the poor little girl.
good luck, praying for you.