The climate and vegetation in Fullerton create unique allergy patterns and some pest issues. The dry weather typical of Southern California increases pollen levels in the spring, and when the Santa Ana winds blow, pollen spreads over a wider area. Major allergy-causing plants in Fullerton include olive, eucalyptus, mulberry, cypress, and grass, with peak pollen levels occurring from spring to early summer (February to June). For those who have immigrated from Korea, it is not uncommon to develop allergies 1 to 3 years after moving to the U.S., so it's wise to remain vigilant from the start.

There are practical methods for managing allergy symptoms. On days with high pollen counts (check Pollen Count on AirNow.gov or Weather.com), changing clothes and showering after being outdoors can be effective. Using an air purifier with a HEPA filter indoors can help reduce indoor pollen levels. Antihistamines (such as Claritin, Zyrtec, Allegra, etc.) are available over the counter at CVS and Walgreens. For severe symptoms, seeing an allergist for allergy testing and considering immunotherapy (allergy shots) can be a fundamental solution.

In terms of pests, the most concerning in Fullerton is the Aedes aegypti mosquito. This mosquito has spread throughout Southern California, including Orange County, increasing the risk of dengue fever, Zika virus, and chikungunya transmission. Unlike regular mosquitoes, Aedes aegypti are active during the day and breed in standing water (such as in plant saucers, buckets, and areas where water collects). Regularly removing standing water around the home is the most effective preventive measure, and using insect repellent containing DEET is also recommended. You can request mosquito control services around your home by reporting to the Orange County Mosquito and Vector Control.

Other pests to be cautious of in Fullerton include the black widow spider. This spider is found throughout California and is typically discovered in garages, sheds, and dark corners. If bitten, a hospital visit is necessary, so wearing thick gloves while cleaning the garage or working in the garden is advisable. Centipedes and scorpions are rare but occasionally reported, and checking the sealing around windows and doors to prevent them from entering is helpful. If you find a bee or wasp nest near your home, it is safest to hire a pest control service rather than attempting to remove it yourself.