Some like it...

With about 100 million Americans under heat alerts, the steamy weather is giving the much-maligned pests a reason to spread their wings and fly.

Entomologists and bug experts say conditions are ripe for the domesticated versions of the brown-colored bugs to get active, including taking to the air.

Because of the extreme heat, they may be trying to find a more comfortable place in which to live, like every body else.. That is, they are on the move to find a better, cooler place. High temperature cause insects to use up a lot of energy.

Their development also depends on ambient temperature. So it is conceivable that they are more active in this current, very hot summer. 

If you see some flying, you know the reason.