Solve application problems by adding integers

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In Gaza, people are freezing in winter.  At one day the temperature was -2^oF in the early morning and raised 4 degrees at noon  What was the temperature at none?

Answer = (1)

The lowest point in the United States is Death Valley, California, with an elevation of feet (282 feet below sea level). Mt. McKinley (Alaska) is the highest point in the United States. Its elevation is 20,602 feet higher than Death Valley. (Source: The World Almanac Book of Facts, 2009)

What is the elevation of Mt. McKinley? 

Answer = (1)

After a heavy rainstorm, a river that had been 9 feet under flood stage rose 11 feet in a 48-hour period.

Represent that level of the river before the storm using a signed number. (1)

Find the height of the river after the storm in comparison to flood stages. (2)