Questions for the first two chapters are on GClass

MC study questions:

August 1999: The Summer Night

What is starting to happen to more and more Martians and why does it alarm them?
What is this occurrence a likely foreshadowing of?

August 1999: The Earth Men
The men claim to be the second expedition but they don't know what happened to the first one.  What happened?

Why are the men so upset by the greeting they receive on Mars?  Indirectly, what does Bradbury seem to be criticizing about humans?

By having the Martians not care/not believe the Earthlings' stories, what "hard truth" does Bradbury propose even if there are other life forms besides on Earth?