Tokyo Electric officials told CNN they can't say when they'll be able to restore those normal cooling.

CNN: STORY HIGHLIGHTS

Normal cooling systems don't require the massive amounts of water -- around 7 metric tons (1, 850 gallons) per hour -- now being poured into the reactors.

CNN: STORY HIGHLIGHTS

Mariela's post-cooling MRI looked normal, which suggested she wouldn't have any long-term cognitive problems due to the lack of oxygen, according to Ms. Peloquin.

WSJ: Hypothermia Cure for Babies: Cooling Infants to Battle Brain Damage

Water from Hurricane Sandy rose almost 7 feet above normal, threatening the water intake structure that pumps cooling water through the plant.

FORBES: Hurricane Sandy Shows Nuclear Is Safe

Instead of cooling it to slow its metabolism we keep it functioning at normal temperature and with oxygen and nutrition.

BBC: 'Warmed liver' transplant first

On the first day, he used the cooling device after riding, and found that his temperature returned to normal within a few minutes.

ECONOMIST: Athletics

There she was wrapped in a cooling blanket that kept her body temperature at about 92 degrees Fahrenheit before it was restored to normal the following day.

WSJ: How Therapeutic Hypothermia Saves Lives of Cardiac Arrest Patients