Traveling to earthquake damaged town –part2

People have (had) [present perfect tense] nothing to eat in (for) one week after the earthquake happened because all (the) roads were ruined by the [<-- :) ] earthquake. There was [was--> singular, were --> plural] a lot of helicopter(s) on in the sky trying to help people but they could not find a place to land and one helicopter crashed when trying to land close ("close to a mountain" //"near a mountain") a mountain.
People were searching potato under the ground which farmers planted while the government army arrived one week later. ["During the week before the army arrived, people were trying to survive by eating newly planted potatoes, unfit to eat."]
The [tour] guider told me there are two dogs live [alive] in the high school and don’t [that won't] leave because their host [owner] is under the building. The two dogs can find some bones of human sometimes because there are still more than 20 persons buried under the crashed school. [The two dogs found some of the bones of the estimated twenty people buried under the demolished school.] She [The tour guide] cried when she told me her nephew is one of these [people] buried under this [the] school.
After [I] traveled [to] this town, I know [learned that] human[s] is [are] so small in front of disaster like earthquake. ["After I traveled to this town, I learned that humans are so small [[in comparison to//when confronted with]] such a disaster as this earthquake."] We should live a wonderful life, because we have a chance to live while so many people did not. [We should live life to its fullest, because we have a chance to live while so many others do not.]