More than 8,000  people have been confirmed dead, one week after Japan's devastating earthquake and tsunami that struck March 11. Another 12,272 people are still missing and more than 500,000 Japanese residents are now homeless because of the disaster.

Many are struggling to survive with no power or heat in freezing winter weather.

Relief work has been hampered by the nuclear crisis as people began hoarding food and gas. Travel to the quake zone is also becoming more hazardous because of the nuclear threat at a local power plant.

Despite the risk of radiation exposure, some aid groups are at work in the region, including CBN's Operation Blessing.

David Darg, Operation Blessing director of international disaster relief and special projects, shared with CBN News the situation they're facing in Japan. Click play for his comments.