At first I thought the smell was just the garbage cans outside the office, left in the sun all day, but that stench of sewage hung in the air all over San Francisco yesterday.

This morning's paper confirmed my suspicion, the smell was coming from the sewers.

The stench - which some described as raw sewage while others put it closer to rotting meat - could be smelled in the Financial District, South of Market and Potrero Hill. City officials believe the odor resulted from hot temperatures on Wednesday.

In the Castro, it was more like a mix of kitty litter and shit. Today is the summer's second "spare the air day" and I hope that work done through the night by city agencies to flush the system worked and we'll only have to worry about the other pollutants in the air.