With hundreds still missing, and 75 already confirmed dead, rescuers struggled to find survivors on the second night after a devastating earthquake struck Christchurch, New Zealand's second largest city Tuesday. Buildings crumbled into the streets after the 6.3 magnitude earthquake, which geologists consider an aftershock to a 7.1 earthquake that caused no casualties in September. Tuesday’s temblor was more devastating and deadly because it was centered only six miles from the city's center and hit during the middle of a workday. The Government has declared a national state of emergency. Officials estimated there could be 100 people trapped in the CTV building alone. Workers attempt to extinguish a fire at the collapsed building of King's Education School, where a group of Japanese students are reportedly trapped. The top three floors of the four-story building collapsed. The facade of a building has crushed a car in Christchurch Tuesday. Murray and Kelly James look at their destroyed house in central Christchurch Wednesday.