N.Y Times' David Leonhardt writes about the global warming effects seen in Harvey: "Warmer weather causes heavier rainfall. Why? When the seas warm, more moisture evaporates into the air, and when the air warms — which has also been happening in Texas — it can carry more moisture."

• "[S]moking, drunken driving and seatbeltless riding each created a public health crisis. Once the link became clear and widely understood, people changed their behavior and prevented a whole lot of suffering."
• "Climate change is on its way to becoming a far worse public health crisis than any of those other problems. Already, it has aggravated droughts, famines and deadly heat waves. In the United States, global warming seems to be contributing to the spread of Lyme disease."