Candice by Amelia C. Adams

As the second to youngest in a very unusual family, Candice McClain has seen each of her sisters develop amazing paranormal gifts that are sure to do a lot of good in the world. Her own gift, weather prediction, seems completely useless in comparison, and she can’t help but wonder why she ended up with the loser power.
Greg Burton was crippled as the result of a car accident, but a new technique in back surgery has enabled him to walk again, giving him hope for the first time in two years that he might have a normal, ordinary life. But there’s nothing at all ordinary about Candice McClain.
When she predicts a natural disaster that threatens to wipe out half the small town of Bagley, Texas, Greg has to decide if he believes her strange story about gifts and powers, or if he should leave and try to move on with someone else. After all, some things are just a little too unbelievable for words.