The Russians planned that, at one point! I remember reading, back when I was in junior high school, that the Russians had some plan involving multi-hundred-meg

The Russians planned that, at one point! I remember reading, back when I was in junior high school, that the Russians had some plan involving multi-hundred-megaton nukes on or near the ocean floor off the pacific coast. Supposedly it would have created a massively radioactive tidal wave that wouldn't have stopped until it hit the Rockies. This is something I vaguely remember reading in the school library, thinking was cool, and using in a report. So it may be my imagination, or it may have been sensationalist writing, or it may have been a real plan, because the Soviets and the US had no shortage of real, ridiculous plans.