Related by context. Frequent words. (Click for all words.) 42 backflow 38 leak 37 rupture 37 leakage 36 embolism 35 seepage 34 sprung leak 34 ruptures 33 vapor cloud 33 toxic fumes 33 Leakage 32 perforation 32 leakages 32 radioactive steam 32 perforations 31 leaks 31 vapors 31 malfunction 31 propane leak 31 sump 31 containment vessel 31 H2S 31 pressurization 31 fumes 31 blockage 30 wellbore 30 reactor containment 30 corrosion 30 blockages 30 ruptured 30 hydrogen sulfide 29 annulus 29 pipeline rupture 29 carbon monoxide 29 seeping 29 radioactive tritium 29 hydrogen sulphide 29 tritium 29 arsenic contamination 29 fissure 28 seep 28 spillage 28 electrical malfunction 28 valve 28 leaking 28 hemorrhages 28 clot 28 hydraulic leak 28 mechanical malfunction 28 spontaneous combustion 28 hydrates 28 valves 27 ammonia leak 27 sewage overflow 27 fracture 27 sewage spills 27 bowel obstruction 27 contaminate drinking 27 fissures 27 vents 26 vapor 26 manhole 26 subsidence 26 peritonitis 26 internal bleeding 26 inhaling fumes 26 benzene 26 faulty valve 26 discontinuity 26 engine compartment 25 earth tremors 25 carbon monoxide leak 25 flooding 25 power outage 25 spillages 25 alarms sounded 25 fibrillation 25 cofferdam 25 ruptured pipe 25 annular 25 lightning strike 25 contaminant 25 Fukushima reactor 25 blaze 25 pipe 24 subdural hematoma 24 fractures 24 adhesions 24 pipes 24 leaking pipe 24 necrosis 24 seeped 24 sinkhole 24 blood clot 24 impingement 24 partial meltdown 24 calcification 24 contaminants 23 stenosis 23 seismicity 23 National Incident Commander