The Flash got his powers from a chemical accident. He was in his lab when a lightning bolt struck a shelf of chemicals, dousing him in a combination of substances that interacted with the lightning's energy. This event altered his molecular structure, giving him super - speed.
The way Flash acquires his powers in the comics is often a result of a chance encounter with a complex set of circumstances. Usually, it involves a laboratory incident where he's exposed to a mixture of chemicals and a burst of lightning, granting him his speed powers.
Well, Flash acquires his powers when he's exposed to a combination of a certain chemical mixture and a powerful bolt of lightning. This unique event triggers his super-speed abilities.
There are specific storylines within the New 52 Flash series where Wally gets powers. These often involve complex plot developments and encounters with powerful forces.
Storm gets her powers back typically by undergoing some sort of spiritual or physical journey. Sometimes it's tied to ancient magic or a special encounter that unlocks her abilities again. The specific circumstances can vary depending on the comic storyline.