S.F. utilities commission preparing for global warming

The San Francisco Public Utilities Commission began Tuesday what could be a long-term plan to save the city and region from a catastrophic change in climate.

Whether it's the rising of the ocean of more than three feet, leading to a collapse of the city's sewer system, or a dramatic reduction in the Sierra Nevada snow pack, resulting in a crippling drought and energy crisis, San Francisco will be ready, said the commission's General Manager Susan Leal.