Summer is a time for adventure, whether you’re visiting family, exploring nature, or heading overseas for the trip of a lifetime. But with travel comes health risks we might not expect, from heat exhaustion and mosquito bites to serious diseases like measles.
Nevada County Public Health wants to help you travel safely and return home healthy. Here are key tips to keep in mind:
Top Summer Travel Health Tips
- Beat the Heat: Stay hydrated, rest often, and avoid outdoor activity during peak heat (3–6 p.m.).
- Be Sun Smart: Use SPF 30+ sunscreen, wear a hat and sunglasses, and stay in the shade when possible.
- Swim Safely: Never swim alone, keep kids and less confident swimmers safe by making sure they wear a life jacket during boating and water activities, and always supervise children near water.
- Prevent Bug Bites: Use insect repellent, wear long sleeves, and check for ticks after time outdoors.
- Stay Up to Date on Vaccines: Make sure you and your kids are vaccinated against measles and other travel-related illnesses at least two weeks before departure.
Bugs, Bites & Preventable Disease
Vector-borne diseases like West Nile virus, Lyme disease, dengue, and Zika are present at many summer travel destinations, and in some cases, right here in California.
West Nile virus is now endemic across the U.S., with most infections occurring between July and October. The first U.S. cases of 2025 have already been reported, and health officials caution that infections may be rising earlier than usual this year
“With West Nile and other mosquito-borne diseases on the rise, prevention is critical,” says Nevada County Health Officer, Dr. Sherilynn Cooke. “Use EPA-registered insect repellent, wear protective clothing, and take time to check for ticks after hikes or time outdoors.”
Protect yourself and your family by:
- Using EPA-registered repellents with DEET, picaridin, IR3535, or oil of lemon eucalyptus
- Applying repellent after sunscreen, not before
- Wearing long-sleeved shirts, long pants, and socks when hiking or camping
- Treating gear with permethrin or buying pre-treated clothing
- Using mosquito nets when staying in unscreened or outdoor settings
- Checking for ticks on your skin, clothing, and gear, especially after outdoor activities
Certain destinations or activities, like visiting farms, camping, or hiking in wooded areas can increase your risk for bug-borne illness. Before you go, visit cdc.gov/travel to learn which vaccines, repellents, or medications may be recommended.
Measles: The Return of a Preventable Threat
Measles was once considered a disease of the past—but 2025 has already surpassed every year since 2000 for confirmed U.S. cases. Most infections are being traced to unvaccinated Americans who were exposed while traveling abroad, often in airports, crowded destinations, or public transportation.
According to the CDC, 1,288 cases have been confirmed this year, including two child deaths, the first measles deaths in the U.S. in over a decade. Alarmingly, experts warn the country may lose its “elimination” status if the outbreak continues.
“We haven’t seen a confirmed measles case in Nevada County yet, but we’ve had cases in Placer, Sacramento, and Yolo counties,” says Dr. Cooke. “Vaccination is your best protection- especially for families with young kids or those planning international travel.”
Before your trip, take the following precautions:
- Infants (6–11 months) should get one dose of the MMR vaccine at least two weeks before international travel.
- Everyone 12 months and older should have two doses of MMR, spaced 28 days apart, unless they have confirmed immunity.
- Not sure of your status? Talk to your doctor at least six weeks before your trip to allow time for vaccination.
Measles symptoms- fever, cough, runny nose, watery eyes, followed by a spreading rash, usually appear 1–2 weeks after exposure. If you develop symptoms during or after travel, call your healthcare provider before going in to avoid exposing others.
Final Thought: Summer Health Starts with Prevention
We all want to make the most of summer and staying healthy is a big part of that. Whether you’re cooling off in Tahoe, flying abroad, or hiking our own Nevada County trails, remember that small steps can prevent big problems and ensure you bring good health home with you.