Happy Birthday, Cait
The entire world is reeling from the aftermath of the near disaster with an elder god's rise. Nowhere is more hurt than San Francisco, including Titan's Tower, and the ravaged bay. Normally, he tries to be very careful not to overuse his powers, tries not to leave the world too affected. But this is special - its both home, and its just before Cait's birthday. As such, all of his normal rules are off.

First there's the city. He isn't so bold as to try and fix the trauma and pain and all, but he can blanket the area with positive psychic impressions, and push people towards good dreams and limit the nightmares. Its a start. Then there's the damage done - using Calculator's memory of everything he's seen while above the city, he slows time until he's effectively moving at 99.999% of light speed, and begins transmuting everything back the way it was - but clean, lacking all the dirt and wear and tear, making the city as new as if everything had just been built. Even at his speed, it takes most of a day.

Then he turns his attention to the Bay - its been most ravaged of all. Death and decay fill it, lifeless fish and other creatures float on the water and litter the sea floor. Somewhere between ocean master's magic and bending time, he starts by accelerating the processes, the decayed things rot away, and become fertilizer in very little time. The spawn slime and acid is disintegrated so things can grow anew, and for good measure, he takes decades of pollution with it. With Poison Ivy's powers, he grows new plant life, then speeds its growth, rebuilding the shattered ecosphere.

Ocean Master's magic and telepathy helps him locate examples of the sea life that should live there, this time leaving out all the invasive species that had moved along the coast. He teleports a few breeding pairs of everything that should be there from elsewhere, restocking the bay. There's not near as much life there as before, but there's the bare bones for recovery.

He's given her not just San Francisco back, but renewed the city, and especially the Bay, and helped the people towards some kind of recovery, but there's one step left.
Reaching out into the ocean, he finds what he's looking for - and he returns a pod of Pacific White-Sided Dolphins to the Bay area, working just one bit of magic. One of the pregnant females undergoes just a little bit of magic, boosting her health and suitability as a mother, and the timescale is time-sped up just right.

When Cait wakes up tomorrow morning, amidst all of the astounded other headlines and reports of various signs of hope will be one that should stand out to her - just to make sure, he plants a suggestion in the lead editor's head, and makes sure there's a good photograph of the pod in the Bay, used as a sign of hope and renewal for the damaged region, making sure when she wakes, there'll be a newspaper nearby with a photo and large headline about the birth of a brand new baby pink dolphin in San Francisco Bay.