The answer to 'centipede swarms' is that centipedes are solitary insects, so a 'swarm' of them is very unusual. Centipedes typically live alone and only come together to mate. If you're seeing a large number of centipedes in your home, it's more likely due to an infestation rather than a true swarm.
Centipede infestations can be caused by excess moisture, rotting wood, or other damp conditions that attract them. You may see signs of centipedes, such as their shed exoskeletons or the centipedes themselves, especially at night or in dark, damp areas of your home like the basement or under appliances. To solve a centipede problem, you'll need to address the underlying moisture issues and use pest control methods to eliminate the infestation. In most cases, it's best to call a professional pest control technician to properly identify and treat the problem.