“He’s the sweetest baby and has been missing since around 6:40ish pm!” she wrote. “Please help us we are worried sick and want him home! if you can help us by looking or praying or offering more search parties we need all the help!”

Xavier is described as measuring nearly 4 feet tall and weighing 28 lbs., with curly brown hair. He was last seen wearing a black shirt and pants and black-and-white Nike shoes.

Family members also said Xavier recently celebrated his birthday on Monday, Sept. 15, Victor Valley News reported.

The incident happened in the wake of Tropical Storm Mario, which affected Southern California.