7-6-12 (Minneapolis, MN)  --  It's another 100-degree day in the Twin Cities -- the second one this week.  The National Weather Service says it's unusual, but not unprecedented, to have two triple-digit days so close together.  They say there were longer strings of super-hot days in the Dust Bowl days of the 1930's.  Ninety-plus to near hundred-degree heat continues in southwest, south-central and southeast Minnesota but the rest of the state has cooled off significantly.  And relief is also due in southern Minnesota when a cold front moves in tonight, with a chance of storms.