NEW : the western Pacific says U.S. is monitoring Japanese power plant for radiation leaks . NEW : Japan is sending coolant in case any nuclear reactors leak . Navy ships are headed to U.S. to help in relief effort . No Japanese casualties are reported ; Navy sets up phone , e-mail information .
NEW : Obama says U.S. is monitoring Japanese power plant for radiation leaks . NEW : U.S. is sending coolant in case any nuclear reactors leak . Navy ships are headed to Japan to help in relief effort . No American casualties are reported ; State Department sets up phone , e-mail information .