radioactive steam burst from another. it prompted remaining workers to be yanked and more residents to flee the area. >> if the fuel rods are exposed the radiation material inside the container could seep out. >> it's also causing the people of tokyo 140 miles away to get very nervous. >> this is tokyo and normally the sidewalk would be packed with people but fears over possible nuclear catastrophe are keeping a lot of people off the streets. >> snarled with traffic looked like a sunday. warnings by the government to stay inside due to radiation risks are being heeded. "i am worried about my health, my life and the radioactivity," this woman says. "that's why i'm wearing a mask." supplies are leaving food store shelves empty. this man says people are buying the food and conserving it for what might be coming. long lines are forming at all gas stations.