First, the USA is not the centre of the world!
I know that comes as a terrible surprise and many will argue with me! The only place the US appears in scripture is the Book of Mormon, the 10 lost tribes have migrated here, and established a mighty empire! With NO archeological findings to support this, ever, I will move on.
In China, in 1938 the Japanese army was attacking the mainland. The Chinese breached the walls of the Yangtze River, kiliing 800 thousand of their own people and stopping the invading Japanese army. Big flood, no one says it was from God.
Yellow River flood, 1938-47 | DisasterHistory.org
Ah!! Everyone says! Angela's not too smart! Houston was natural, not man made! Since when has building on a flood plain, paving over the swamps and estuaries, been natural? Houston is a direct result of bad planning and remediation.
Read some of the more scholarly articles about how and why the disaster part of Houston could have been ameliorated with proper urban planning! And sorry, this is part of what I studied in my undergrad degree, including courses on natural disasters, urban planning and land use.
So, anyone saying this disaster was from God doesn't have a clue, from a science point of view. From a Biblical point of view, God said he would never send a world wide flood again. Although, there are many Scriptures in the OT that talk about the consequences of not caring for the land. I did a paper on this in seminary, very long, I can give verses if anyone wants.
Basically, God has warned us about caring for the land. He sent Jesus to die for our sin. But he left the earth in a state of Fall, until Jesus returns, and by not caring for the earth, it is no longer able to carry the people in the world, especially careless, foolish, greedy and selfish sinners! I know the OP dealt with this, I just don't see a single verse NT or OT where God used natural disasters after the flood. Unless you want to consider Sodom and Gomorrah as a natural disaster for sin. To me, it sounds more like a nuclear explosion, but that is just conjecture on my part, I would be willing to concede the point if someone has any other evidence.
Even with Israel, who were abysmally wicked, and God sent/allowed drought for 3 years, it was to try and wake up Ahab, not to punish them. And he used people to wipe out the Omri line, and other kings' lines. And when God finally gave judgment, it was with Assyrians, in 722 BC, taking them captive, intermixing them with other captives, and dissolving the 10 tribes.
The same for Judah, except this time it was the Babylonians in 586 BC, but, because Jesus would come from the line of David, the tribe of Judah, he preserved their lineage and brought them back 70 years later, a chastised people.
So no, Houston, New Orleans, Florida, the Caribbean are not a specific punishment for sin. If you live in a hurricane zone, build accordingly. If you live in an earthquake zone, don't build on a fault line.
And if you live on the western part of North American, with no rain for months, and bad forest management practices, don't be surprised that human set fires are burning down California, Oregon, Washington, Idaho, Montana, Alberta, Manitoba and BC. And yes, global warming is real, but how much of that is because of carbon, I do not know!
I notice a lot if you easterners have no idea how bad the west is right now! But then, that is what the media ignores, so why would you?
Besides, what I heard was that the left was saying Houston was God's judgment in the Bible Belt, for opposing gay marriage, transgenders, racism etc! But, I scarcely think people who don't believe in God are qualified to speak for what God is doing, or not! Do you?