Infrastructures affected include those who are most vulnerable to the weather conditions such as Power lines and road and bridge. The harsh conditions damages these infrastructures. A damage in any of them usually cause a ripple effect and also affects others indirectly too.
This affects the economy by a steady decline being noticed because the economy is usually run on these infrastructures.
This is true. The homestead act gave people huge properties for a small price if they were willing to work on the field for 5 years. After 5 years it would become their and they could do with it as they wished.