To protect yourself:
Stay away from heavily populated residential areas, if possible.
Use mosquito repellents, even indoors.
When outdoors, wear long-sleeved shirts and long pants tucked into socks.
When indoors, use air conditioning if available.
Make sure window and door screens are secure and free of holes. If sleeping areas are not screened or air conditioned, use mosquito nets.
If you have symptoms of dengue, speak to your doctor.