You are experiencing a Carpenter ant swarm. They tend to swarm in spring and early summer months. Carpenter ants are also a part of a colony. The winged males will fly out of this colony attracted to light. They will find a way into your house. Heavy rains that come this time of year brings them into your house. Usually, they fly in the evening being attracted to the lights on in your home. When you see this happening, you know you have a Carpenter ant colony very close to your home.