Scripture often tells us about God in pictures and images and little stories. But in fact God is very different from us men and from how we project our own beings into what we think of God. So, basically, God has no long grey beard, He probably doesn't sit on a literal throne in a castle and He isn't constantly feeling anger about the world, even when people do a lot of evil there. I mean, God is not an old man on a throne shaking his fist against the Earth.
But God is definetly a person and as far as we are persons we resemble God, that's what the book of Genesis implies by saying God made us in His image.
And a person can disagree with what happens, He can have values and He can speak about that to us, through prophets, through the bible, through reason and natural revelation.
So what all of this means is that this creation, our world anyway, is not in order. There is evil happening and there is a lack of knowing God in the way He wants to be known, as love incarnate (Apostle John found this). What is important is to see how God is not angry with us as small little humans, He is angry with sin. He looks down from Heaven and sees everything that happens here. Suppose you would live in some appartment with TV's and monitors everywhere and they would always show perverted crimes - it's like God lives in such an appartment. He knows everything. But, on the other hand, there is still a lot of good happening on the world, and God sees that too.
So God is not really angry with his creation, only with the existence of evil on this world, in various ways. And it is His goal to spread His faith and love so people could escape evil and overcome it with good. And eventually Jesus Christ will come back and change absolutely everything. Opinions vary on what exactly will happen, but I think Jesus' Return will refuel the stars, end diseases, allow men to live far far longer than before and the devil will be taken away so this dark influence won't be there anymore either.
Until then, however, mankind's life must be challenged with natural evils and disasters. This doesn't mean God hates us or that He is even angry with us, it means that our ambitions need to be checked lest we think we are gods and pervert everything in an even worse way than things are perverted now. And with perversion I mean, the poor are neglected, children are abused, the elderly are mistreated, those who suffer find no kindness, and so on. It is such things God can be said to be angry with.
But please don't try to imagine God as angry. God is not an angry God. It's just the biblical way of speaking about it. I mean, what would the ancients have thought if a prophet came to them and said, "Dear People of the United Israel, it is my conviction that not so much first class felonies should happen in this fine country and that is why I will give you a precautionary punishment according to article X in our constitution". No, the prophet just said, God is angry with you.
Please get this right, our Lord is a pleasure to be with and His presence with us when He comes to us is friendly, majestic and kind, it often reminds me to the smell of incense in church.