While driving in heavy rain, your visibility is reduced. Which of the following is the most appropriate combination of actions to ensure safety?

1. Turn on your hazard lights and maintain the speed limit.
2. Turn on your high-beam headlights and tailgate the vehicle in front.
3. Reduce your speed, turn on your low-beam headlights, and increase your following distance.
4. Pull over to the hard shoulder immediately and wait for the rain to stop.