The Prophet Malachi (3:19-20) teaches us that at the end of days, the sun's intensity will increase, vastly heating the earth. The wicked shall burn like straw but the righteous shall be healed.
Our sages elaborate that as we arrive at Judgment Day, Hashem will "remove the sun from it's protective cover." In a nutshell, that's what global warming is all about. We can see that all over the world, there are record temperatures, floods, and climatic craziness.
The "Ramchal" of saintly and blessed memory, Rabbi Moshe Chaim Luzzatto writes in his Kabbalistic discourse Pnot HaMerkava says that the naked light of the sun will be illuminating for those who love Hashem. In other words, for them, it will be beneficial.
Hashem in His amazing loving-kindness is giving us a sweet wakeup call: "Judgment Day is near, beloved children. Don't be afraid, just strengthen yourselves in emuna and come closer to Me." The Solar Storm from last Thursday is still sending heat particles that are making the Aurora Borealis (Northern Lights) into a dazzling light show that used to be seen only from the states bordering Canada and northward, but can now be seen even as south as South Dakota, such as the image from Sunday that we received courtesy of Spaceweather.com:
Look at Hashem's compassion - it's the Three Weeks, but yet the wakeup calls are this sweet. Let's strengthen ourselves in emuna now, and we won't have to spend so much money on expensive sunscreen lotions.