an thanks in part to the ultimate fighting championship with stars like mcgregor and rhonda rossi.any participate in mma matches for youth across the world. >> helps me be more confident. >> when we first started we would go to tournaments and maybe there was like a hundred kids and now in the database we probable have about six or 700 that are looking for fights actively. >> it really is getting so, so popular. >> oh, it is and i feel like with this fight tonight mcgregor holds that underdog kids like that are really rooting for them. >>> still ahead on "eyewitness news," while many are worried about what harvey will do to their physical possessions, mental health professionals say the storm can take a toll on the mind. >> trigger us to remember prior incidents. >> what psychologists are suggesting people do if they are triggered by the storm. and how severe weather could >> ♪ >> welcome back. over the last 12 years since katrina doctors and therapists have treated many people for the emotional toll the storm took on people's lives. now as harvey hits texas some are reliving dark