Not everyone is benefiting from Silicon Valley's latest tech boom.

As rents soar, nearly 55% of Silicon Valley workers do not make the $90,000 necessary to support a family of four in the region. The area has the fifth-largest homeless population in the country, and in the past three years the problem has gotten much worse, according to the latest Silicon Valley Index.

After reporting on the homelessness crisis last fall, we returned this month to find more people living on the street around San Francisco and a growing and deteriorating homeless camp in San Jose.