Related by context. Frequent words. (Click for all words.) 47 Controlled burns 46 airborne spores 46 retardants 45 unburnt 45 respiratory irritant 45 Hydrogen sulfide 44 flammable substances 44 Spider mites 44 Emerald ash borer 44 pest infestations 44 fungal spores 43 mold fungi 43 foliar diseases 43 ash borers 43 Sulphur dioxide 43 SoCal wildfire 43 oak wilt 43 sprays 43 False alarms 42 pine pollen 42 contaminating groundwater 42 methoprene 42 pyrethrins 42 groundwater plume 42 chemicals 42 pyrethrin 42 Tiny particles 42 spray 42 insect repellants 42 HAZMAT crews 42 biohazards 41 Malathion 41 chloropicrin 41 temperature inversions 41 Algae blooms 41 airborne particulates 41 flammables 41 malathion 41 hazmat crews 41 carbaryl 41 tick infested 41 diazinon 41 firefighting foam 41 insecticidal 41 emerald ash borers 40 preventives 40 carbon tetrachloride 40 chemical 40 Firefighters doused 40 noxious odors 40 Asbestos fibers 40 mosquito traps 40 subterranean termites 40 polluted groundwater 40 Brisk winds 40 Controlled burn 40 fungicidal 39 Medflies 39 PCBs polychlorinated biphenyls 39 pentachlorophenol 39 Rotenone 39 pesky mosquitoes 39 buffelgrass 39 Volatile organic compounds 39 Dense smoke 39 Prevailing winds 39 Nitrogen oxides 39 ash 39 herbicides pesticides 39 chemical vapors 39 organophosphate 39 Hydrogen peroxide 39 prompts evacuations 39 pyrethroid 38 Diesel exhaust 38 insecticide 38 Allergic reactions 38 Paraquat 38 salicylate 38 erionite 38 combustion gases 38 woodsmoke 38 soil fumigant 38 inversion layer 38 birch pollen 38 Migrating birds 38 insect borne diseases 38 cogon grass 38 Elaine Makatura spokeswoman 38 paint remover 38 unsightliness 37 Particulates 37 rotting vegetation 37 flare ups 37 invasive beetle 37 radioactive byproducts 37 soot particles 37 creosote 37 grassfires 37 mosquito borne viruses 37 insects rodents