One of the biggest cities hit Saturday and early Sunday was Wichita, Kansas, where resident Katie Sykes said torrential rains produced a "river in my front yard" and the prospect of a tornado had her shuddering in fear.

CNN: April 16, 2012 -- Updated 0326 GMT (1126 HKT)

The torrential rains could lead to significant river flooding near the Gulf, as flood watches are still in effect from last week's heavy rains.

CNN: 30 million in path of winter storm

But unlike on Sunday, when torrential rain soaked the jubilee pageant on the River Thames, the showers did not become a downpour.

CNN: Queen's balcony wave, flyover cap Diamond Jubilee celebrations