Homelessness has migrated toward rural and suburban areas. The number of homeless people has not changed dramatically but the number of homeless families has increased according to a report of HUD. The United States Congress appropriated $25 million in the McKinney-Vento Homeless Assistance Grants for 2008 to show the effectiveness of Rapid Re-housing programs in reducing family homelessness. In February 2009, President Obama signed the American Recovery and Reinvestment Act of 2009, part of which addressed homelessness prevention, allocating $1.5 billion for a Homeless Prevention Fund. The Emergency Shelter Grant (ESG) programs name was changed to Emergency Solution Grant (ESG) program, and funds were re-allocated to assist with homeless prevention and rapid re-housing for families and individuals. Causes
Major reasons for homelessness include:

Rent and eviction
Gentrification is a process in which a formerly affordable neighborhood becomes popular with wealthier people, raising housing prices and pushing poorer residents out. Gentrification can cause or influence evictions, foreclosures, and rent regulation. Increased wealth disparity and income inequality causes distortions in the housing market that push rent burdens higher, making housing unaffordable.In many countries, people lose their homes by government orders to make way for newer upscale high-rise buildings, roadways, and other governmental needs. The compensation may be minimal, in which case the former occupants cannot find appropriate new housing and become homeless. Mortgage foreclosures where mortgage holders see the best solution to a loan default is to take and sell the house to pay off the debt can leave people homeless.
These studies showed that in adolescent rodents exposed to caffeine, functioning of serotonin systems was affected, leading to increased anxiety; anxiety-related behaviors were higher than in adult rats exposed to the same amount of caffeine; and reward seeking behaviors as well as mood fluctuations were increased as the rodents matured. Long-term health effects
When consumed in moderation, caffeine can have many beneficial effects. However, over the course of several years, chronic caffeine consumption can produce various long-term health deficits in individuals. Among these, rodent studies have suggested caffeine intake may permanently alter the brains excitability. As previously stated, long-term effects are most often seen in adolescents who regularly consume excess amounts of caffeine. This can affect their neuroendocrine functions and increase the risk of anxiety-disorder development. Treatment
For individuals being treated with benzodiazepines such as alprazolam (Xanax) for anxiety disorders, even small amounts of caffeine may have negative effects on treatment. Caffeine is able to negate the effects of benzodiazepines which can lead to heightened levels of anxiety and even panic attacks. Studies have linked caffeine intake to increased rates of cytotoxicity and cell death by necrosis associated with benzodiazepine use. However, this phenomenon (thought to be mediated via TSPO) is also present with benzodiazepine use alone. The clinical significance of caffeine-benzodiazepine induced cytotoxicity in humans is unclear and has not been shown to be harmful. Although benzodiazepines are effective at managing acute caffeine-induced anxiety symptoms,  avoiding caffeine is generally recommended rather than increasing benzodiazepine intake.