As summer heat bakes the concrete canyons of Bunker Hill, two pests are making their presence known in our high-rise communities: the German cockroach and the yellow fever mosquito. The German cockroach thrives in the warm, humid microclimates created by our dense cluster of towers—think the shadows of the California Plaza or the loading docks of the Bonaventure—where HVAC systems and elevator shafts provide perfect highways. These pests are especially active now because the 85°F heat accelerates their breeding cycle, and the lack of rainfall drives them indoors, seeking moisture in the condensation lines and utility chases that run through our steel-and-concrete buildings. Look for droppings that resemble black pepper, shed skins, or a musty odor near kitchens and bathrooms, and check the gaps around pipe penetrations in your unit's utility closet—a common entry point in our slab-foundation structures. Meanwhile, the yellow fever mosquito, a daytime biter, is exploiting the standing water that collects in the saucers under potted plants on balconies and in the stormwater drains that line Grand Park and the Music Center plaza. The heat island effect of our paved hilltop keeps these mosquitoes active longer into the evening, and the dense vertical layout means they can breed in rooftop gutters or even in the drip pans of air conditioners. Watch for small, dark mosquitoes with white stripes and be vigilant about eliminating any stagnant water within 100 feet of your building's entrance. Below are the top-rated Los Angeles exterminators who specialize in these specific seasonal threats.