Leidy Vanessa Luna Villalba, 23, a nanny from rural Paraguay, had arrived on Wednesday with the sister of Paraguay’s first lady. The luxury mid-rise tower’s sudden and dramatic collapse at 1:30 a.m. Thursday plunged families across the United States and Latin America into a surreal nightmare. “We’re trusting in the power of the Lord,” her relative said as waves of white foam crashed onto the shore. Across Surfside, Jewish and Catholic community members gathered on street corners and in frontyards, inside synagogues and on the beach to form prayer circles and read psalms. He was missing after staying at their 11th-floor apartment with his brother, who was visiting from Alabama.