Transcript for At least 39 dead as rescue efforts continue in Italy bridge collapse

do have new reporting here in that deadly bridge collapse in genoa, Italy. Dozens of vehicles plunging nearly 150 feet to the ground, and there are concerns this evening that more of that bridge could now fall. Hundreds of nearby residents evacuated. The intense search for survivors still continues. And ABC's Julia Macfarlane is right there on the scene tonight. Reporter: Tonight, a clear look at the devastation after that catastrophic bridge collapse. At least 39 are dead and officials worry tonight that number may rise. Rescuers desperately searching through twisted piles of steel and concrete, searching for survivors. The possibility of finding people alive under the rubble are shrinking with the passing time, but we never lose hope. Reporter: This video capturing the moment the heavily trafficked bridge came crashing down Monday during a sudden rainstorm, taking over 30 vehicles with it. These residents telling me, when the bridge collapse, it felt like an earthquake. And the danger may not be over yet. There are fears that the rest of the bridge may collapse on top of those hazards. This image showing the bridge before. Tonight, over 600 people evacuated from those surrounding buildings. Investigators trying to determine what caused the massive span to plummet, looking at possible design flaws or inadequate maintenance. The prime minister vowing action. Saying, "These are unacceptable tragedies that should not happen in a modern society." And Julia Macfarlane reporting in tonight. And Julia, last night, as this was breaking, you reported here on the growing concern in Italy over the safety of roads and bridges. We, of course, heard that debate right here in the U.S., as well. You're now at the bridge site tonight and officials are worried that more of that bridge could collapse? Reporter: Exactly, David. That's a real fear here. That morel of that bridge could collapse, taking with it more structures and threatening more lives. There's real outrage here in Italy tonight, but despite that, the governor the private company that is responsible for the highways is taking any responsibility for this tragedy. That debate on the safety of public infrastructure in this country continues. David? Julia Macfarlane with us again tonight.

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