Depending upon the conditions, either nucleation or growth may be predominant over the other, and as a result, crystals with different sizes and shapes are obtained (Control of crystal size and shape constitutes one of the main challenges in industrial manufacturing, such as for pharmaceuticals).
For the region, see San Fernando Valley. San Fernando is a city located in the San Fernando Valley, in the northwestern region of Los Angeles County, California. It is completely surrounded by the City of Los Angeles.
The hot conditions have fire crews on alert. Los Angeles firefighters knocked down a two-acre brush fire in West Hills in the San Fernando Valley on Saturday afternoon. Meanwhile, hundreds of Riverside County firefighters were battling a 35-acre fire along the 15 Freeway in Temecula.