The first 500 words of your story are a contract with the reader. They tell the reader what kind of experience they are signing up for. Do not start with weather.
Do not start with the character waking up. Do not start with backstory. Start in motion — your character doing something that reveals who they are and hints at the conflict to come.
The first sentence should create a question in the reader's mind that they need answered. The first paragraph should establish tone. The first scene should introduce stakes.
By word 500, your reader should know the genre, the protagonist's immediate problem, and the world's basic rules. The hook is not a trick. It is a promise.
Keep it, and your readers will follow you to the final chapter..