Caused this explosion. Heres more from the deputy fire chief. We did have an active gas leak when we arrived. They were able to secure it. The hazmat team went in and secured the gas initially and itco was able to secure it from there. Whether that was the cause or not, we have not confirmed. Right now no confirmed fatality, but two people have serious injuries. Police are warning everyone in that area to just stay away. Cnns rosa flores is live near the scene in plantation, florida. I know youre with someone, rosa, who was inside that l. A. Fitness center when this explosion happened. Tell us about it. Reporter yes, ana. This is dan feller. Dan, thank you so much for sticking it out. It actually started raining and hes sticking it out with us. You were saying you were at a yoga class that started at about 11 00 a. M. This morning. Tell us what happened after that . Well, were in the class about 20 minutes or so. Im sitting on the floor right next to the instructor. Things are going fine. Tough class, a little hard on my body. Couldnt do the things they wanted and all of a sudden we hear the loudest bang, and i looked at the instructor and the next thing we know all of the Ceiling Tiles were falling down and flaking on everyone, 50 of us in the class. The next thing i realize all of the windows had blown in. So what is this . Its not lightning or some transformer break or something. What went through your mind . What went through my mind was gas explosion. I witnessed them before in other times and we waited to decide and we were scared to leave the building and we feared there could be lightning. What are other people doing around you . Everyone is trying to go out, is it safe to go out . Safe to stay in in whats going on . Wondering how could a building explode . People are in the parking lot and my car has the windshield blown out and i tried to get the car because they said no getting cars until monday. If theres water intrusion in my car thats not a good thing. What did the parking lot look like . There was garbage strewn and lots of cars. As you see blown all over and were on the opposite side and the roof and that building just blew everything out. So it was just a terrible scene. There were some people one person had a leg injury and people were tending to him. Cops arrived pretty quickly and the Fire Department a little slower. We learned that theres about 21 injuries so far. At least one of them is a child. Did you see anyone injured and the types of injuries they might have sustained . One gentleman in his 20s who was lying on the ground and he seemed to have a shin injury and a cut and there was a tourniquet on it and the Fire Department later came and took them away. Other than that, it appeared to be minor injuries, and i think its its too, perhaps, how the building is designed. I think the windows are probably designed not to shatter, but to break like car windows are. Theyre hurricaneproof, i believe. Its a new building and so i think the windows shattered versus going out and hitting people. We are so glad youre safe and thank you so much for sticking it out in the rain and ana, ill send it back to you. Rosa, are you hearing about potential Structural Integrity issues to those buildings around the Shopping Mall . Clearly there are issues with the one directly impacted and authorities told us theyre planning to search some of the surrounding buildings and what more can you tell us about that . Yes. According to the Fire Department the primary search has already been completed and that is of the the zone of the explosion, but they do say that a secondary search is going on. I asked about the size of the impacted area and they dont have it quite defined. I did talk to another gentleman, another man who was exercising at the time of the explosion and actually driving away with his children and he says that he lives about a mile away and people in his neighborhood felt the shaking, and so, ana, i think it will be interesting to to learn. We dont know yet and weve asked the Fire Department the exact size of the impacted area because, you know, of course, those homeowners question whether theres infrastructure damage to their homes. So its unclear just how many buildings were impacted. Okay, rosa flores in plantation, florida, for us. Thank you. Now to the west coast where people in Southern California are picking up after two massive earthquakes in about 24 hours in trying to be ready in case theres another one. Oh, my god oh, my god oh, my god oh, my god this is terrifying. The second massive earthquake in as many days rattling homes, triggering gas fires, knocking out power in a wide swath of Southern California even into nevada. The city of ridgecrest again right on the spot where the ground shook most violently. Oh, my god. I got it all on video. And the earth hasnt stopped rumbling and rolling there since thursday. A geologist telling cnn that theyre registering aftershocks every 30 seconds. So thousands of earthquakes and experts warning another major jolt could hit that area at any time. Cnns alexandra field is in ridgecrest, california right now. Alexandra, i know you were there. You felt this earthquake late last night. Are people breathing easier yet or is there still anxiety they the ground could shake again . Reporter everyone felt it and no one will forget it. It is one thing to have a 6. 4 magnitude. To have a 7. 1 on its heels and theres always the possibility that Something Like that can happen. It truly stunned a lot of people in the community and even the ones used to it. It was friday night and it was the Dinner Service and there are about 150 people who were here and all of a sudden, an a the restaurant was shaking and it was bouncing. The sound like a roar coming through here and then the southbound of glass smashing. People were running for the doors trying to get out or trying to take cover under tables and the staff in the kitchen heading for the back door. I want you to see a little bit of the impact in here and the food just left on the counter, of course, the plates smashing to the floor. This is what its going to look like inside a lot of floors, stores and restaurants in this community. The incredible thing is there are no reports of fatalities at the moment and that is a truly incredible thing and a blessing considering the sheer force of it and something that truly rattled people. You asked how people are coping with it. Nerves are frayed. We spoke to one of the owners of this restaurant and hes been through a lot of earthquakes and heres what he said about this one. Earthquakes themselves theyre pretty deafening. Theyre just super loud. Just the earthquake themselves and especially if youre in a building and you add the rattle and the racket of the objects moving and so then, yeah, the noise and everything moving around you and then youre trying to walk out and everything is shaking so you cant your initial feeling is to get out, but you have things jumping out at you and you have, you know, you have the ground shaking literally before you so you dont know which way its going to go. So its kind of like being in a crazy fun house. A crazy fun house. Certainly one you dont want to be in and certainly one that people were running to get out of. The instinct always to run, but he looked around and said this was his restaurant and he decided to stay exactly where he was to try to point out two exits in the building to people who were clamoring to get out and certainly very helpful. The power was out and the lights were out and there was a lot of noise and comforting for people to know how they could get out of this building, ana. And food still left on the counter and that tells a lot about the state of panic that was going through that restaurant mere hours ago. Alexandra field, thank you for your reporting. For more now on the magnitude of this earth wake and the like likelihood of another and i want to bring this robert from the u. S. Geological survey. A 4 shock followed by a 7. 1 magnitude quake. What should residents of Southern California expect next because the first two were already so powerful. Thats right. Theres about a 3 chance over the next week for an earthquake that might be larger than the one than we had last night. A 3 chance because theres been these two backtoback, and we know there were several smaller earthquakes in between, but because of the extent of these earthquakes, does that increase or decrease the likelihood of another big one . Well, i mean, earthquakes cause other earthquakes. So the 3 chance is a real opportunity for a bigger earthquake to happen, but of course, thats about a 97 chance that smaller earthquakes will happen and thousands of them already. Were hearing every 30 seconds and right now there is an after shock. What can you tell us about this particular fault line . The earthquake occurred in the 40mile fault line in the ridgecrest area and it occurred ten miles below the earth and the big earthquakes that we have in Southern California and its one of those things that we see living in earthquake country. We always hear theres going to be a big one. Theres a big one, inevitable. 7. 1 sounds like a big one. Is it . Well, it is. And the earthquake last night was about 11 times bigger than the one on july fourth and the magnitude 7. 1 earthquake in Southern California is even bigger yet. So the great thing about this particular earthquake its an opportunity for people to be prepared to learn about protective a protective action such as drop, cover and hold on. Great results. People did very well in ridgecrest and its a testimony to the fact that people are prepared and they know what to do. So were very happy about that and we hope to continue to get the message out. For those of us who dont live in an earthquakeprone area, describe for us what a 7. 1 magnitude earthquake feels like. I was in West Los Angeles when i felt the earthquake near ucla and it began very slowly, a slow rolling motion and it continued on for about 20 seconds. People who were much closer to the epicenter felt much more violent shaking and some of the images and films that were shown earlier show things falling off the walls and thats indicative of very heavy shaking and typically, when you get farther away from the source of the earthquake, the shaking and what you feel actually decreases. There is a Warning System and we know some residents in that area affected didnt get an alert. Is that a flaw in the Warning System or whats that about . The shake alert earlier Warning System is working as it should, and in this particular case the alerts that were supposed to be sent to the county of los angeles were set at a particular threshold where at a minimum level of shaking. So the reason why the folks in Los Angeles County didnt receive it is because that minimum threshold of shaking where there would be potential damage wasnt reached and so both the app that was developed by the city of los angeles and the shake alert system performed as designed, but its also brought out a lot of conversations about next steps so for us this is a great learning experience. Robert de groot, we are so grateful no one was hurt, and thank you very much for joining us. Thank you, ana. More ahead on the california earthquakes including reaction from people who had to drive with boulders falling down around them. Plus, an apology from former Vice President joe biden. What hes saying about his comments on race that stirred up a lot of criticism. Youre live in the cnn newsroom. So nice to meet you june, jay, ji, kay, raj, and. Ray good job, brain say hello to neuriva, a new brain supplement with clinically proven ingredients that fuel five indicators of brain performance. Neuriva. Oh, my god all these boulders. Just some of the mess left behind when a 7. 1 earthquake shook Southern California last night, Falling Rocks blocking a few roads in the ridgecrest area and cracks opened up across several others. This was the second very large earthquake to shake Southern California, nevada and mexico in a span of a little more than a day and geologists are warning another significant quake could happen at any time even into next week. Lets bring in cnns Stephanie Elam now in ridgecrest, california. Show us around the neighborhood youre in and are you feeling those after shocks . Reporter oh, for sure. 7. 1 last night, it was a longer one. It was one of those rolling earthquakes as opposed to the jolting one, ana, that were used to experiencing out here in california and it was very, very long and that is actually part of the concern is because it was so long it could do more damage. I want to show you here behind me one of the things that happened after that earthquake hit. Youve got this mobile home here that was hit as far as, it looks like a fire and theyre not exactly sure which thing triggered it, but these are some of the concerns and gas lines may get disrupted and water lines may get disrupted and power has been restored and that was a concern for the hospital that was shut down and minimally helping people and thats one of the concerns, but whats noteworthy about this, too, ana and you have an earthquake of this size and its been 20 years since weve seen an earthquake of this magnitude and you have a lot of adult, young adults in this area that have not experienced shaking to this extent and it was a wakeup call to a lot of people out here to be prepared and to be ready because it is really hot out here for one thing. Its over 100 degrees expected to be today so they wanted to restore that power quickly to help these people, but also remembering to be prepared and have their kits because as we know the aftershocks could be as high as a 6something magnitude that is in and of itself note worthy and that could do more damage. If you think about having one earthquake and that could disrupt some things and then another one that disrupts it and the third one could affect infrastructure and thats why theyre out checking on buildings and checking on bridges and checking all of those things to make sure theyre safe before they get people back in them. When you drive around town, you see doors are closed as theyre busy cleaning up. Stephanie elam in ridgecrest, california reporting on the 7. 1 magnitude earthquake. Remember the debate between Kamala Harris and joe biden . 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[ applause ] i was vetted i was vetted by he and ten serious lawyers he appointed to go back and to look at every single thing in my back ground from finances to anything id done. Everything. And he selected me. Ill take his judgment about i had record and my ability to handle a job over anyone elses. Cnns arlette is on the trail with biden. How was his speech received today . Reporter well, ana, the k crowd here fsz very receptive to bidens speech where he made a very noteworthy apology when it came to his recent comments about working with segregationist senators. He made those comments a few weeks ago at a fundraiser and it drew a lot of criticism from his democratic opponents in the 2020 race and people were upset that he was they interpreted as him praising the segregationist senators and the ability to work with them and biden here in South Carolina was really defending his record and talking about those early years when he was in the senate, that he did have to work with segregationists in order to get things done, but he also apologized for the way that he had talked about them just a few weeks ago. Take a listen to what