Leave it to William

Went to the post office a few mins ago and stopped at the daycare to ask mom something. She was getting her stuff together so she and the nephews could leave ontime today. Both boys hugged me tightly and William says, "Aunt Sherrie I have something for you." He hands me a white paper with this written on it:

H u v e 4 i s
o n t f w o v r

Afraid to ask but asking anyway, I said, "What does it say?"

He smiled. "Help is on the way."

Just what I need... a rescue. Now how did he know that?