It was a cruel anniversary present for the people of New Orleans to receive yet another damaging hurricane on the 7th anniversary of hurricane Katrina this week.
The collective wishful thinking of the Republican Party, holding their conference in Tampa, Florida, this week, perhaps helped shift the storm's track - if you're superstitious. Isaac had been expected to hit Tampa but, the fear everyone has had for seven years came true: New Orleans was in the firing line.
Isaac was no Katrina - it only reached Category 1 out of 5. Katrina reached 5 and broke a number of records.
But if Isaac wasn't the most powerful hurricane, it was still a big one. The air pressure tumbled into the 960s - alarmingly low for a Category 1 hurricane. Most of all, Isaac was always about the rain.
Paint this picture in your mind: a city the size of Auckland stands on a flood plain at the end of the Mississippi river. Parts of it are two metres below sea level. Large levees protect the city from the river, lake and sea. But a four-metre storm surge - on top of the high tide - inundated houses again.