Last updated at 2:52 PM (UK time) on 14th March 2011
America was on alert today amid fears the nuclear fallout from the Japan earthquake could reach the West Coast of the U.S.
Scientists warned of a 'worst-case scenario' in which a meltdown could blast highly radioactive material into the atmosphere.
This would be then picked up by powerful 30,000ft winds carrying the debris across the Pacific and hitting America within four days. Link also provides a larger map. Daily Mail