>> jennifer eccleston with that update from london. jennifer, thank you. >>> back here at home, an investigation is under way into what may have ignited a smoky fire at a downtown parking garage. firefighters in chicago racing to put out that blaze this afternoon. at least six cars completely destroyed and six others damaged. five people were evacuated from the 15-story structure. no injuries were reported. >>> turning now to the weather, extreme, millions bracing for sizzling temperatures. and take a look at this video, inside a severe thunderstorm racing its way through north dakota. senior meteorologist rob marciano joining us now from new york city's central park. and rob, the weather really has been all over the place. >> it has. and we had a report, below average may and first week of june for many across the east and we're seeing a wild swing now. look at these changes in the pattern. a big trough out west, a big ridge building in the east. 90s from denver all the way to chicago today. and building again tomorrow, farther to the

it's full of restaurants and bars. >> jennifer eccleston reporting for us tonight. thank you, jennifer. we'll come back to you throughout the broadcast. we want to talk to somebody who was there tonight, an eye witness at a restaurant while this emergency was happening. he joins us on the phone right now. what did you see and what did you hear tonight? >> well, i just heard, we were just around the corner from it, having dinner, just having dinner out with a few friends and my partner and literally all we hear is shots fired and quite loud bang. we ran to the windows, see lots of blue lights and police everywhere and look out of the window of our restaurant and we can see people lying on the floor and just ambulances and police response around them. the security of the restaurant is telling us to evacuate the restaurant, as quick as we can, the police are telling us to run up the road, further away from london bridge, and now we're currently sitting in a bar, just in a safe spot, we've been told there's security around, inside the perimeter here, and that's all we kn

abc's jennifer eccleston with the very latest. >> reporter: tonight, london on lockdown. multiple incidents at the london bridge, borough market, all within a mile of each other. >> ladies and gentlemen, please reeve leave the area. >> i saw loads of people run away from the market. people lying on the ground. >> reporter: it started a little before 11:00 p.m. london time. witnesses saying multiple people hit when a van crossing the london bridge allegedly striking groups of people. the bbc reporting that at least one person is dead. >> i can't tell you anything at the moment. i need you to move towards safely. >> reporter: this person tweeting a photo of the immediate aftermath. people tending to the injured on the bridge. >> saw loads of police cars turning up and there was a period of quite intense gun fire. >> reporter: nearby, at this london restaurant in borough market, police yelling, "stay down." evacuating the restaurant as a precaution. this eyewitness describing the chaotic scene. >> two armed police three shots. >> reporter: at this hour, metropolitan police t