SURFSIDE, Fla. – The bodies of two children were found in the rubble of the collapsed condo building outside Miami on Wednesday, raising the death toll in the disaster to 18. The children were 4 and 10 years old, said Miami-Dade County Mayor Daniella Levine Cava, who provided the update at an afternoon news conference. The number of missing people is now 145. "Any loss of life, especially given the nature of this unexpected, unprecedented event, is a tragedy,'' Levine Cava said. "But the loss of our children is too great to bear." Earlier in the day, Levine Cava has said four additional victims had been identified, at the time bringing the total to 16. Search officials vowed to press on with the rescue effort around the clock despite the possibility of tropical storms approaching the area.