Henderson has a desert climate, which has different environmental characteristics compared to the East or Midwest.

The first thing to know is about scorpions. The Arizona Bark Scorpion inhabits the Mojave Desert area where Henderson is located. This scorpion is the most venomous in the United States, and being stung can cause severe pain and paralysis, which may require medical attention for children and the elderly.

They can also be found indoors, often hiding in dark, damp places (like inside shoes, bathroom corners, or storage areas). It's a good idea to check the condition of screens after moving and to develop a habit of shaking out shoes before wearing them indoors. A blacklight flashlight can be used to find scorpions and is useful for checking around the house at night.

The Black Widow Spider also inhabits the Henderson area. They are usually found in outdoor storage sheds, under bushes, and in garage corners. They won't attack unless provoked, but their bites can cause severe muscle cramps and pain, so caution is necessary. Wearing thick gloves while cleaning outdoors or gardening is a basic preventive measure.

Desert Gnats and Fire Ants are also commonly reported pests in Henderson. Fire Ants tend to cluster in outdoor lawns or dirt paths in parks, and they will attack in groups if stepped on or disturbed. Some doctors recommend having an EpiPen on hand for severe allergic reactions. It's advisable to warn children to be careful of dirt mounds while playing in parks.

In terms of allergies, the Henderson and Las Vegas area is well-known for severe pollen allergies. Ironically, despite being a desert, the trees and plants used in landscaping produce large amounts of pollen. The Olive Tree, in particular, is widely planted in Southern Nevada and releases a tremendous amount of pollen in the spring (February to May). People who are not familiar with olive allergies from the East may suddenly experience allergic reactions after moving here. The Mulberry tree is also common in the Henderson area and is one of the main allergy triggers in spring.

Regarding endemic diseases, it is essential to be aware of Valley Fever, caused by the Coccidioides fungus found in the soil of the Mojave and Sonoran deserts. Inhaling spores in dusty environments can lead to infection, which starts with mild flu-like symptoms (coughing, fever, fatigue) but can severely affect the lungs in some cases. Those with weakened immune systems are at higher risk of infection. It is recommended to wear an N95 mask when digging in desert areas or being near construction sites.

Due to the dry air characteristic of the desert climate, many people experience or worsen conditions like rhinitis, eczema, and dry eyes. Using a humidifier indoors, staying hydrated, and applying sunscreen according to the weather are essential health management practices. The intense sunlight in Henderson has a very high UV index, often exceeding 10 during the summer. It is recommended to develop a habit of using sunscreen with SPF 50 or higher regularly before moving.