In the 1500's
California went through an 80 year drought. During the winter there
were blizzards in Central California, the Salinas river froze solid
where it flowed into the Monterey Bay. During the summer there was no
humidity, no rain, and temperatures in the hundreds for many
months. During one year in the 1840's there was no measurable rain in
Santa Barbara. (The highest measured rainfall in an hour also was in
Southern California, 11 inches in an hour) The same native
plants that lived through that are still on
the hillsides of California. California native plants that do not
normally live in the creeks and ponds are very drought
tolerant.