The answer to 'wasp odor' is that a strong, unpleasant wasp odor is typically caused by the presence of a wasp nest nearby. Wasps release pheromones and other chemicals as a defense mechanism, and a concentrated nest can produce a distinct, lingering smell. Common symptoms include an overpowering odor, buzzing sounds, and seeing wasps flying around the affected area.
The best solution is to locate and remove the wasp nest, either through DIY methods or by calling a professional pest control service. Attempting to remove a nest yourself can be dangerous, so it's often best to call in an expert, especially for large or hard-to-reach nests. They have the proper tools and protective equipment to safely eliminate the nest and address the odor problem.