>>> TONIGHT, THE TORNADO OUTBREAK AND MORE TROUBLE ON THE WAY. AT LEAST 11 TWISTERS REPORTED. MOST OF THEM RIPPING THROUGH TOWNS NEAR CHICAGO. MORE TORNADOES POSSIBLE TONIGHT ALONG WITH NEW WARNINGS OF MORE HEAVY RAIN THAT COULD MAKE THAT FLOODING CATASTROPHE EVEN WORSE. >>> PLUS, MORE THAN 80 MILLION UNDER NEW HEAT ALERTS. WE'LL SHOW YOU WHY THE VEGAS STRIP FEELS LIKE IT'S MELTING. AND MORE RECORD-BREAKING TEMPERATURES ON THE WAY. IS THERE ANY RELIEF IN SIGHT? >>> ALSO BREAKING TONIGHT, FOR THE FIRST TIME THE FDA APPROVING THE SALE OF AN OVER-THE-COUNTER BIRTH CONTROL PILL. THE CONCERN OVER HOW MUCH IT WILL COST. >>> THE MYSTERY OVER THAT COCAINE FOUND IN THE WHITE HOUSE. WHY THE SECRET SERVICE IS NOW ENDING ITS INVESTIGATION. >>> THE PRESIDENT IN FINLAND SAYING VLADIMIR PUTIN HAS ALREADY LOST THE WAR IN UKRAINE. AND WHAT HE SAYS ABOUT A U.S. SENATOR WHO'S WHAT THIS MEANS FOR MOVIES AND YOUR FAVORITE SHOWS. >>> SEVERE TURBULENCE INJURING PASSENGERS. IMAGINE A FUTURE WHERE EVERY FLIGHT IS A SMOOTH ONE. THE NEW TECHNOLOGY THAT COULD HELP PREDICT AND AVOID SEVERE TURBULENCE. IN OUR SERIES "AI REVOLUTION." >>> OUR EXCLUSIVE LOOK TONIGHT INSIDE THE BATTLE TO CONTROL THE FLOW OF DEADLY FENTANYL INTO THE U.S. M ON THAT TERRIFYING DAY. >> Announcer: THIS IS >>> THIS IS "NBC NIGHTLY NEWS" WITH LESTER HOLT. >>> AND GOOD EVENING, I'M TOM LLAMAS, IN FOR LESTER TONIGHT, FROM THE SOUTHWEST TO THE NORTHEAST, THERE ARE SEVERE WEATHER ALERTS. WITH NEW TORNADO THREATS AGAIN TONIGHT, AFTER 11 REPORTED TWISTERS SWEPT THROUGH THREE DASTATES OVERNIGHT. ALL WHY SO MANY AMERICANS ARE STRUGGLING WITH THAT RECORD-BREAKING HEAT, WITH TEMPERATURES EXPECTED TO RISE TO ABOUT 115 IN CITIES LIKE PHOENIX AND LAS VEGAS. 86 MILLION UNDER HEAT ALERTS AND IN THE NORTHEAST, THE POSSIBILITY OF MORE HEAVY RAIN AND FLOODING IN HARD-HIT VERMONT AND UPSTATE NEW YORK, AFTER THE CATASTROPHIC FLASH FLOODS WE'VE BEEN FOLLOWING ALL WEEK ALL OF IT WILL BE PLAYING OUT RIGHT INTO THE WEEKEND, INTO THE SEVERE SUMMER OF 2023. AND IT'S WHERE WE BEGIN TONIGHT, WITH NBC'S ERIN McLAUGHLIN IN THE HEAT OF THE MOMENT IN LAS VEGAS. >> Reporter: TONIGHT, FROM COAST TO COAST, MOTHER NATURE'S ONSLAUGHT IS UNRELENTING. OVERNIGHT, MULTIPLE TORNADOES TOUCHING DOWN AROUND CHICAGO. >> RIGHT THERE >> OH, MY GOD. >> Reporter: WREAKING HAVOC AT THE O'HARE INTERNATIONAL AIRPORT AND LEAVING A TRAIL OF DESTRUCTION, WITH DOZENS OF HOMES DAMAGED. >> ALL OF A SUDDEN, IT WAS GOING ALL AROUND, IT WAS BLOWING ALL OVER, SO -- IT WAS LIKE NO WAY TO GO TO PROTECT YOURSELF FROM IT >> Reporter: NBC'S MAGGIE VESPA IS THERE. >> WE'RE HERE IN ILLINOIS, WHERE IF YOU COME INTO ROOM FIVE, YOU CAN SEE THE ROOF OF THIS MOTEL IS COMPLETELY GONE. HERE'S THAT SAME SHOT FROM ABOVE THE OWNER SAYS THANKFULLY THOUGH ONE WAS INSIDE WHEN THE STORM CAME THROUGH >> Reporter: AND TODAY, FLASH FLOODING IN MISSISSIPPI TRIGGERED BY TORRENTIAL RAINS MULTIPLE ROADS AND BUILDINGS SUBMERGED. THIS COMES AS MORE THAN 86 MILLION AMERICANS SWEAT THROUGH TRIPLE-DIGIT TEMPERATURES TRIGGERED IN PART BY A DEADLY HEAT DOME THAT ONLY TIGHTENS ITS GRIP ON THE SOUTHWEST IN TEXAS TODAY, THE DEMAND FOR ELECTRICITY REACHING ITS HIGHEST POINT EVER, AFTER 2021'S ROLLING BLACKOUTS, THERE'S FRESH CONCERN FOR THAT STATE'S POWER GRID MIAMI NOW 33 CONSECUTIVE DAYS WITH A HEAT INDEX OVER 100 DEGREES. AND SIN CITY IS SCORCHING. LAS VEGAS POISED TO TIE ITS ALL-TIME HEAT RECORD, 117 DEGREES, THIS WEEKEND ON THE STRIP, EVEN THE PAVEMENT IS DANGEROUS. >> IT IS SUPER HOT OUT HERE AND SO, LIKE, THE BOTTOM OF MY SHOES, I'M WORRIED THAT IT'S GOING TO GET STUCK TO THE CONCRETE AND MELT. >> Reporter: NEVADA'S ONLY LEVEL ONE TRAUMA CENTER IS REPORTING A TROUBLING RISE IN SEVERE BURNS FROM THE SUPER HEATED STREETS >> THE PAVEMENT CAN HEAT UP TO 160 TO 170 DEGREES AND ALL IT STAKES IS A COUPLE SECONDS OF YOUR SKIN BEING EXPOSED TO THAT. >> Reporter: 73-YEAR-OLD AIR FORCE VETERAN CHRISTOPHER MALCOLM WAS WAITING FOR THE BUS WHEN HE SUDDENLY FELT FAINT. >> I WAS FEELING OVERHEATED AND SO I SAT DOWN ON A SIDEWALK >> Reporter: UNABLE TO GET UP,THE HOT PAVEMENT SEARED THROUGH HIS PANTS, CAUSING THIRD-DEGREE BURNS, WHICH REQUIRED SURGERY. >> I FEEL LUCKY TO BE ALIVE. >> Reporter: YET ANOTHER CASUALTY OF THE BRUTAL SUMMER HEAT THAT HAS THE POTENTIAL TO BE THE DEADLIEST YET. >> ERIN, THAT'S AN INCREDIBLE REMINDER OF HOW DANGEROUS THE STREETS CAN BE ALL WEEK, WE'VE BEEN TALKING ABOUT THIS BRUTAL HEAT. I KNOW YOU ARE THERE IN LAS VEGAS TONIGHT SHOW US JUST HOW HOT IT IS THERE. >> Reporter: YEAH, THAT'S RIGHT, TOM. I HAVE AN INFRARED THERMOMETER HERE LET'S CHECK IT OUT RIGHT NOW. THE STREET IS REGISTERING IN AT 162 DEGREES FAHRENHEIT AND EXPERTS SAY THAT'S HOT ENOUGH TO SEAR IN SECONDS. AN IMPORTANT REMINDER TO PEOPLE AND PETS TOM? >> WOW ALL RIGHT, ERIN, THANK YOU. >>> AND IN THE NORTHEAST, JUST AS THE FLOOD WATERS ARE RECEDING THERE'S A NEW THREAT TONIGHT, WITH MORE RAIN COMING DOWN, AND MORE FLOODING POSSIBLE KRISTEN DAHLGREN IS THERE, AND KRISTEN, WE CAN SEE THIS IS THE LAST THING VERMONT NEEDS TONIGHT. >> Reporter: EXACTLY, TOM. AND SOME OF THE HEAVY RAIN ALREADY BEGINNING TO COME DOWN THIS IS WHAT THEY WERE WORRIED ABOUT. THIS HEAVY RAIN ON TOP OF THE ALREADY SWOLLEN RIVERS AND CREEKS. THE NEXT FEW HOURS ARE GOING TO BE CRITICAL HERE FLASH FLOODS ARE THE BIGGEST CONCERN AT THIS POINT, AND THOSE ARE SO HARD TO PREDICT. IT JUST DEPENDS ON WHERE THAT HEAVY RAIN COMES DOWN AND HOW SATURATED THE GROUND IS THE GOVERNOR WARNING EVERYBODY TO TAKE HEED OF THOSE WARNINGS, TO STAY INSIDE DURING THE THICK OF IT. SWIFT WATER RESCUE TEAMS ARE IN PLACE, READY FOR ANY OTHER RESCUES LIKE THEY HAVE BEEN DOING ALL WEEK. THEY HAVE BEEN MONITORING THE DAMS. RIGHT NOW, THEY ARE WATCHING THEM IN REAL-TIME, TO MAKE SURE THEY DON'T GO OVER THAT'S NOT EXPECTED, BUT MORE BAD WEATHER ON THE WAY, TOM. >> KRISTEN DAHLGREN AND HER TEAM, WHO HAVE BEEN BRAVING ALL THE ELEMENTS THIS WEEK THANK YOU FOR THAT. >>> WE TURN NOW TO THE WHITE HOUSE, AND THAT MYSTERY OVER THE BAG OF COCAINE FOUND IN THE ENTRANCE TO THE WEST WING. THE SECRET SERVICE NOW SAYING THE INVESTIGATION IS OVER, BUT WITH NO SUSPECT FOUND. KELLY O'DONNELL HAS THE LATEST >> Reporter: TONIGHT, THE SECRET SERVICE COMING UP EMPTY, AFTER DAYS OF INVESTIGATION AND SOPHISTICATED FORENSIC TESTING OFFICIALS CANNOT IDENTIFY WHO LEFT A SMALL BAG OF COCAINE IN A STORAGE CUB BY USED FOR ELECTRONIC DEVICES NEAR THIS WEST WING ENTRANCE. HOUSE SPEAKER KEVIN McCARTHY RAISING DOUBTS >> IF THEY CAN'T TELL US WHO BROUGHT IT, WHAT ELSE IS HAPPENING IN THE WHITE HOUSE THEY CAN'T TELL US ABOUT? WHAT ELSE IS COMING INTO THE WHITE HOUSE THEY CAN'T TELL ME ABOUT? THAT EVEN CONCERNS ME MORE NOW >> Reporter: LAB TESTS CONDUCTED AT THE FBI CRIME LAB DID NOT DEVELOP LATENT FINGERPRINTS AND INSUFFICIENT DNA WAS PRESENT FOR INVEST DAYIVE COMPARISONS OFFICIALS SAID THEY USED VIDEO AND ENTRANCE LOGS TO COMPILE A LIST OF MORE THAN 500 INDIVIDUALS WHO HAD ACCESS TO THE ENTRANCE IN THE DAYS BEFORE IT WAS FOUND, JULY 2nd BUT WITHOUT PHYSICAL OR VIDEO EVIDENCE, OFFICIALS COULD NOT CONNECT THE DRUG TO ANY SUSPECT. >> IT'S A COMPLETE FAILURE. THIS THING IS RIDICULOUS >> Reporter: THE WHITE HOUSE SAID IT IS REVIEWING THE FINDINGS DEMOCRATS ACKNOWLEDGE DESPITE LAW ENFORCEMENT'S EFFORTS, THE MYSTERY REMAINS. >> IT SEEMS LIKE IT'S -- AT THIS POINT, IT'S JUST INCONCLUSIVE >> KELLY IS WITH US LIVE TONIGHT KELLY, WHILE OFFICIALS SAY THEY FOUND NO EVIDENCE OF WHO THE BAG BELONGED TO, DO THEY HAVE A THEORY >> Reporter: WELL, TOM, THAT ENTRANCE IS USED ON PRIVATE TOURS. CONTRACTORS ARE DOING RENOVATIONS OF THE SITUATION ROOM STAFF AND MILITARY WALK THROUGH THAT ENTRANCE, TOO. BUT SOURCES FAMILIAR WITH THE INVESTIGATION SAY A LEADING THEORY IS IT COULD HAVE BEEN A VISITOR. TOM? >> ALL RIGHT, KELLY O'DONNELL FOR US KELLY, THANK YOU FOR THAT. >>> PRESIDENT BIDEN ON HIS WAY HOME AFTER KEY SUMMIT MEETINGS OVERSEAS TONIGHT, TAKING AIM AT RUSSIA'S PRESIDENT, BUT ALSO, SLAMMING A U.S. SENATOR HE SAYS IS JEOPARDIZING NATIONAL SECURITY. PETER ALEXANDER HAS THE LATE DETAILS >> Reporter: TONIGHT, AS THE FIGHTING RAGES ON IN UKRAINE WITH THAT COUNTRY'S COUNTEROFFENSIVE AGAINST RUSSIAN FORCES STALLED, PRESIDENT BIDEN DECLARING THE OUTCOME IS ALREADY CLEAR. >> PUTIN'S ALREADY LOST THE WAR >> Reporter: HERE IN HELSINKI, THE PRESIDENT FORMALLY WELCOMED NATO'S NEWEST MEMBER THE ALLIANCE BRINGING IN FINLAND DEMONSTRATING HOW PRESIDENT BIDEN SAYS VLADIMIR PUTIN'S INVASION HAS BACKFIRED. INSISTING RUSSIA CANNOT KEEP UP THIS FIGHT FOR YEARS. >> EVENTUALLY, PRESIDENT PUTIN IS GOING TO DECIDE IT'S NOT IN THE INTEREST OF RUSSIA, ECONOMICALLY, POLITICALLY, OR OTHERWISE, TO CONTINUE THIS WAR >> Reporter: THE PRESIDENT TONIGHT SINGLING OUT PUTIN IN THE SAME ROLL WHERE FIVE YEARS AGO, FORMER PRESIDENT TRUMP SEEMED TO ACCEPT PUTIN'S DENIALS ABOUT ELECTION INTERFERENCE OVER THE ASSESSMENTS OF UGS INTELLIGENCE AGENCIES. MR. BIDEN ALSO WEIGHING IN ON THAT FAILED MILITARY REBELLION LED BY ONE-TIME PUTIN ALLY YEVGENY PRIGOZHIN, WHO HAS NOT BEEN SEEN IN PUBLIC SINCE >> WE'RE NOT SURE WHERE HE IS. I'D BE CAREFUL WHAT I ATE. >> Reporter: THE PRESIDENT HERE TAKING AIM AT A GROWING CONTROVERSY BACK IN WASHINGTON, TOO, SLAMMING ALABAMA SENATOR TOMMY TUBERVILLE FOR BLOCKING HUNDREDS OF SENIOR MILITARY PROMOTIONS, INCLUDING FOR A NEW JOINT CHIEFS CHAIRMAN, TO PROTEST THE PENTAGON'S RECENT POLICY CHANGE ON ABORTION >> HE'S JEOPARDIZING U.S. SECURITY BY WHAT HE'S DOING IT'S JUST TOTALLY IRRESPONSIBLE IN MY VIEW >> Reporter: TUBERVILLE'S BEEN OBJECTING TO THE NEW POLICY THAT PROVIDES GOVERNMENT-PAID TIME-OUT AND REIMBURSING TRAVEL COSTS FOR SERVICE MEMBERS AND THEIR DEPENDENTS SEEKING ABORTIONS. HE SAYS THAT CHANGE REQUIRED SENATE APPROVAL >> CAN'T TURN AROUND AND CHANGE THE LAW WITH A MEMO. THAT'S ALL I'M SAYING. I' . >> Reporter: TUBERVILLE IS FACING CRITICISM FROM FELLOW REPUBLICANS FOR HOLDING UP THOSE MILITARY PROMOTIONS, AND WE JUST LEARNED DEFENSE SECRETARY AUSTIN SPOKE WITH TUBERVILLE TONIGHT, WARNING HIM ABOUT THE IMPACT ON MILITARY READINESS. TOM? >>R A R ALEXANDER, THANK YOU. >>> ALSO DEVELOPING TONIGHT, THE FDA APPROVING THE OVER THE COUNTER BIRTH CONTROL PILLS FOR THE FIRST TIME ANN THOMPSON IS LIVE ON SET WALK US THROUGH THIS >> WOMEN ARE GOING TO BE ABLE TO BUY THIS PILL, JUST LIKE THEY BUY ASPIRIN, AT THE GROCERY STORE, THE DRUGSTORE, EVEN ONLINE, ALL WITHOUT A PRESCRIPTION IT IS CALLED OPILL AND CONTAINS JUST ONE MOTHER MOAN. FIRST APPROVED BY THE FDA AS A PRESCRIPTION 50 YEARS AGO, THE AGENCY SAYS IT IS SAFE AND EFFECTIVE, IF THE PILL IS TAKEN CORRECTLY. OPILL IS APPROVED FOR WOMEN OF ALL REPRODUCTIVE AGE, INCLUDING TEENAGERS. NOW, THAT'S SOMETHING THAT IS EXPECTED TO IMPROVE ACCESS AND HOPEFULLY REDUCE UNINTENDED PREGNANCIES. WHAT IS NOT KNOWN TONIGHT IS HOW MUCH IT WILL COST. THE MANUFACTURER WOULD ONLY SAY IT WILL BE AFFORDABLE AND SHOULD BE AVAILABLE EARLY NEXT YEAR. >> ALL RIGHT, ANNE, THANK YOU FOR THAT. >>> ALSO TONIGHT, THE DISTURBING VIDEO JUST RELEASED BY AUTHORITIES IN SOUTHERN CALIFORNIA. SHOWING AN OFFICER TRYING TO ARREST A WOMAN DURING A TRAFFIC STOP, CLUTCHING HER NEWBORN BABY AN L.A. COUNTY SHERIFF'S DEPUTY SEEN PUNCHING THE WOMAN MULTIPLE TIMES DEPUTIES FORCIBLY REMOVING HER CHILD IT HAPPENED LAST YEAR, BUT THE VIDEO WAS RELEASED LATE YESTERDAY. THE L.A. COUNTY SHERIFF SAYS HE ONLY JUST LEARNED ABOUT IT. HE SAYS THAT DEPUTY WAS RELIEVED OF FIELD DUTY A FEW DAYS AGO. >>> OKAY, WE TURN NOW TO AN NBC NEWS EXCLUSIVE, WITH THE BIDEN ADMINISTRATION FACING CRITICISM OVER ITS RESPONSE TO THE FENTANYL CRISIS. THE DEPARTMENT OF HOMELAND SECURITY TONIGHT UNVEILING NEW HIGH-TECH TOOLS, INCLUDING A.I., TO HELP OFFICIALS DETECT THE DRUG IN THE MAIL >> Reporter: KATIE WAGNER IS ONE OF TENS OF THOUSANDS OF VICTIMS OF AMERICA'S FENTANYL CRISIS. >> KATIE WAS THE A LIFE OF THE PARTY. SHE WAS SO LOVED >> Reporter: HER MOM, LISA, TELLS US HER WORLD WAS SHATTERED WHEN KATIE OVERDOSED IN 2021. >> I WAS SENTENCED TO DEATH THAT NIGHT >> Reporter: TONIGHT, THE DEPARTMENT OF HOMELAND SECURITY SAYING THIS NEW SCANNING TECHNOLOGY COULD HELP SOME FENTANYL SHIPPED THROUGH THE MAIL, USING A.I. TO DETECT IT >> WE ARE TEACHING MACHINES HOW TO IDENTIFY DIFFERENT CONTRABAND >> Reporter: NBC NEWS LEARNING THAT DHS PLANS TO WEED OUT PILL PRESSES USED TO DISGUISE FENTANYL AS OTHER DRUGS, AND TRACE CRYPTO-CURRENCY USED BY MEXICAN CARTELS BUT THOSE MOVES WON'T CUT OFF FENTANYL FROM THE SOURCE MOST INGREDIENTS ARE SHIPPED TO MEXICO FROM CHINA. WILL ANY OF THE EFFORTS YOU'RE ANNOUNCING TODAY WILL DO ANYTHING TO STOP THAT, OR IS THIS JUST A BAND-AID >> WE'RE HOPING THAT THE NEGOTIATIONS THAT WE ARE COMMENCING WITH CHINA'S REPRESENTATIVES WILL ACTUALLY CREATE SOME SPACE FOR US TO ADDRESS WITH OUR CHINESE COUNTERPARTS, DISCOURAGE FENTANYL. >> Reporter: THEN NANT KILLS NEARLY 70,000 AMERICANS A YEAR AND REPUBLICANS PIN THE BLAME ON BIDEN ADMINISTRATION BORDER POLICIES >> PRESIDENT BIDEN KNOWS WHY THIS IS HAPPENING. IT'S HAPPENING BECAUSE THERE'S AN OPEN SOUTHERN BORDER. >> Reporter: AND FOR LISA, THESE NEW EFFORTS ARE ALL TOO LITTLE, TOO LATE >> A LOT OF PEOPLE LIKE TO DISREGARD DRUG ADDICTS. THESE PEOPLE ARE SOMEBODY'S LOVED ONES. >> Reporter: TONIGHT, DHS TELLS US THEY'VE SEIZED MORE THANON STRIKE. WHAT THIS MEANS FOR YOUR FAVORITE SHOWS >>> ALL RIGHT. WE ARE BACK NOW WITH REPORTS OF THIEVES ADDING TO THE MISERY OF A DEVASTATING LANDSLIDE THAT HIT LUXURY HOMES IN LOS ANGELES. POLICE PATROLLING THE AREA TODAY CATCHING TWO SUSPECTS, GET THIS, TRYING TO ROB HOUSES THAT HAD BEEN ALREADY EVACUATED. DOZENS OF RESIDENTS HAD TO FLEE >>> WELCOME BACK. ALL THAT DANGEROUS WEATHER WE'VE BEEN SEEING LATELY LEADS TO COSTLY AIR TRAVEL NIGHTMARES, AND NOW SOME CARRIERS ARE TURNING TO ARTIFICIAL INTELLIGENCE TO HELP MICROFORECAST MINUTE BY MINUTE TO HELP CUT DELAYS AND CANCELLATIONS, EVEN POSSIBLY AVOID SEVERE CANCELLATIONS, EVEN POSSIBLY AVOID SEVERE TURBULENCE TOM COSTELLO EXPLAINS. >> Reporter: THE CHALLENGE FOR THE NATION'S AIRLINES, NAVIGATING A SUMMER OF WEATHER EXTREMES RECORD HEAT, RAIN, TORNADOES, LIGHTNING AND HISTORIC FLOODING. IN ST. PETE-CLEARWATER, FOUR PEOPLE WERE INJURED AFTER AN ALLEGIANT AIR FLIGHT HIT SEVERE TURBULENCE >> ONE POSSIBLE BROKEN ANKLE. >> Reporter: NOW, ARTIFICIAL INTELLIGENCE IS HELPING TO MICROFORECAST THE WEATHER TO THE ZIP CODE TO HELP AIRLINES CUT DELAYS, AND COULD SOON PREDICT THE KIND OF SEVERE INJURY-CAUSING TURBULENCE WE'VE SEEN IN RECENT YEARS. >> ATTENTION ALL RADIOS 431 LaGUARDIA HAS BEEN CAUGHT IN A GROUND STOP >> Reporter: THE A.I. PROGRAM IS CALLED GALE IS MY FLIGHT GOING TO LEAVE ON TIME FROM LaGUARDIA AIRPORT THIS AFTERNOON? THE COMPANY IS TOMORROW IO. >> WE'RE SEEING THE EXPECTED WEATHER FORECAST FOR THAT FLIGHT AT THAT EXACT TIME OVER THE COURSE OF THE DAY >> Reporter: GALE USES SATELLITES AND THOUSANDS OF OTHER DATA POINTS, SENSORS ON PLANES, DRONES ROVHO HOVERING OVER ZIP CODES. JETBLUE HAS INVESTED IN THE PROGRAM USING GALE TO SHIFT ITS OPERATIONS AROUND EXTREME WEATHER, DOWN TO A SPECIFIC RUNWAY EVEN THE EXACT TIME TO START DE-ICING PLANES DURING THE WINTER. IN A BUSINESS WHERE TIME IS MONEY, JETBLUE SAYS THIS MICROFORECASTING IS ALREADY SAVING IT $300,000 EVERY MONTH, $3.7 MILLION IN A YEAR >> THE RATE IN WHICH WE HAVE CANCELED FLIGHTS, THE RATE IN WHICH WE'VE DELAYED FLIGHTS ASSOCIATED WITH WEATHER HAS IMPROVED REMARKABLY, JUST >> Reporter: DRIVING THE EXTREMES, CLIMATE CHANGE. >> WE ARE FACING THE GREATEST CHALLENGE ARGUABLY THAT OUR GENERATION IS GOING TO SEE IN WEATHER AND CLIMATE. >> Reporter: A NEW AI TOOL TO HELP AIRLINES MICROPREPARE FOR THE EXTREMES. >> A GREAT REMINDER TO LEARN CPR. THAT'S "NIGHTLY NEWS" FOR THIS THURSDAY. I'M TOM LLAMAS IN NEW YORK.