Flying Insects Around Lights at Night: Why They Swarm After Rain

After the first rains, lights can become surrounded by clouds of small flying insects.

The short answer

Termite swarmers, flying ants, midges, beetles and moths are attracted to light after rain, when humidity and warmth trigger emergence. Most are harmless and short-lived, though swarming termites can signal a nearby colony. Reduce them by switching off unnecessary lights, using warm-coloured bulbs, closing doors and fitting screens. Check for termite signs if wings are found indoors.

Why after rain

• Humidity triggers mass emergence.
• Insects navigate to lights.

Reduce them

1. Switch off or dim outdoor lights.
2. Use yellow or warm bulbs.
3. Close doors and windows at dusk and use screens.
4. Sweep up wings and dead insects.

When to check

• Piles of shed wings indoors may mean termites.
• Large swarms inside the house.

When to call a professional

If the problem is widespread, keeps returning or you are unsure what you are dealing with, a professional inspection will save time and avoid wasted effort.

Frequently asked questions

Are they dangerous?

Mostly harmless.

Are they termites?

Check wings and number.

Do light traps help?

Outdoor traps may, positioned away from doors.

How long does it last?

A few days to weeks.

This guide is part of IPest's complete resource on fly control. For identification help, prevention and treatment options, see our full fly control guide for Bangalore.