FLOODS IN THE GRAND CANYON. DANA GRIFFIN IS FOLLOWING IT ALL AND HAS THE LATEST. >> Reporter: TONIGHT, A CLOSE CALL FOR HAWAII AFTER DODGING HURRICANE HONE. >> FACING HOW LARGE THIS SYSTEM IS -- >> Reporter: IT CHURNED CLOSE TO THE BIG ISLAND OVERNIGHT, WHIPPING WINDS UP TO 75 MILES PER HOUR, DUMPING HEAVY RAIN, CUTTING POWER TO THOUSANDS AND GROUNDING FLIGHTS. >> MEANWHILE, A POPULAR TOURIST SPOT AT THE BOTTOM OF THE GRAND CANYON IS CLOSED AFTER A WEEKEND-LONG RESCUE EFFORT. MORE THAN A HUNDRED TOURISTS AIRLIFTED FROM THE HAVASU INDIAN RESERVATION AFTER VIOLENT FLASH FLOODING RIPPED THROUGH ON THURSDAY, WASHING AWAY THIS, AND HIKERS LOSING EVERYTHING. THIS SLAB OF CANYON WALL DISINTEGRATES. >> HOLY [ BLEEP ]. CARRIED AWAY BAY A RAGING RIVER. >> THAT WAS CRAZY! >> THE CURRENT SO POWERFUL SHANOA NICKERSON AND HER HUSBAND WERE SWEPT AWAY. HE SURVIVED, SHE'S STILL MISSING. SHANOA'S BROTHER IS SHARING A MESSAGE OF HOPE. >> WE LOVE HER, AND WE WON'T GIVE UP UNTIL WE FIND HER. >> WE WERE THE FIRST ONES TO GET OUT OF THE BOTTOM OF THE CANYON. >> LETICIA WAS ALSO IN THE CANYON. >> THE WATERS WERE RAGING. RIVERS WERE WASHING OUT. THERE WERE A LOT OF PEOPLE WHO WERE TRAPPED. >> LETICIA SAYS SHE'S ALIVE BECAUSE A FRIEND WARNED HER WHAT TO DO IF THEY HEARD THUNDER. >> IF WE HEARD THUNDER WE SHOULD HEAD OUT OF THE CANYON BECAUSE IT WAS A MONSOON SEASON AND I HEARD THUNDER, AND IT WAS REALLY LOUD AND I SAID MAYBE WE SHOULD HEAD TO HIGH GROUND. HE SAVED MY FAMILY'S LIFE AND I WILL FOREVER BE GRATEFU