The headlamps of rescuers working after dark light the scene amid a group of collapsed residential buildings in La Guaira, Venezuela, June 30, 2026. After devastating twin earthquakes flattened entire residential neighborhoods last week, experts fear the official death toll of 1,719 could be a serious undercount. (Adriana Loureiro Fernández/The New York Times) By TIBISAY ROMERO, ISAYEN HERRERA, LUIS FERRÉ-SADURNI and GENEVIEVE GLATSKY In the first days after the calamitous earthquakes in…