At the Fukushima No. 1 power plant the backup cooling system has failed. 1000s have been evacuated. Temperature is rising in the cooling tanks and to alleviate the pressure they are about to release contaminated, radioactive air. The headline may be a bit sensational but it says, "Fears nuclear reactor will explode as 'out of control' cooling system fails at plant."
http://www.dailymail.co.uk/news/arti...-crippled.html