>>> TONIGHT, PRESIDENT BIDEN BLASTING DEMOCRATS TRYING TO PUSH HIM OUT, BUT IS THE DRUMBEAT TO STEP ASIDE GETTING LOUDER? THE PRESIDENT DEFIANT TODAY IN BATTLEGROUND WISCONSIN DECLARING, I'M STAYING IN THE RACE. I'LL BEAT DONALD TRUMP, BUT THE NEW REPORT THAT AN INFLUENTIAL DEMOCRATIC SENATOR IS TRYING TO GET COLLEAGUES TO ASK HIM TO LEAVE THE RACE. PLUS, MAJOR DONORS NOW DEMANDING THE PRESIDENT DROP OUT. >>> ALSO BREAKING TONIGHT THE THREAT FROM HURRICANE BERYL SLAMMING MEXICO AND TAKING AIM AT THE TEXAS COAST. WE'RE TRACKING IT LIVE, AND MORE THAN 140 MILLION AMERICANS ARE SWELTERING UNDER HEAT ALERTS AS A DANGEROUS NEW WILDFIRE SCORCHES CALIFORNIA. >>> THE RECORD TRAVEL RUSH. MILLIONS HITTING THE ROAD AND THE AIRPORT THIS WEEKEND. WHEN IS THE BEST TIME TO GO? >>> HOLIDAY TRAGEDY. THREE KILLED. MORE INJURED WHEN A SUSPECTED DRUNK DRIVER PLOWS THROUGH A CROWDED NEW YORK CITY PARK AND THE ALARMING NEW DETAILS WE'VE JUST LEARNED ABOUT THAT SUSPECT. >>> THE STUNNING POWER SHIFT IN GREAT BRITAIN. THE NEW PRIME MINISTER MEETING WITH THE KING AFTER WINNING IN A LANDSLIDE. >>> PLUS, MORE ON THOSE SHARK ATTACKS IN TEXAS AND FLORIDA. YOU'LL HEAR FROM A SURVIVOR FROM HER HOSPITAL BED DESCRIBING HOW SHE FOUGHT IT OFF AND HOW TO STAY SAFE IN THE WATER THIS SUMMER. >>> AND THE NEW WARNING ABOUT SUNSCREEN MISINFORMATION. DOCTORS DESCRIBING THE DANGER NOW BEING SPREAD BY SOCIAL MEDIA INFLUENCERS. >> Announcer: THIS IS "NBC NIGHTLY NEWS" WITH LESTER HOLT. >>> AND GOOD EVENING. I'M TOM LLAMAS IN FOR LESTER. WE START WITH MAJOR DEVELOPMENTS IN THE RACE FOR THE WHITE HOUSE. PRESIDENT BIDEN IS FACING A GROWING CAMPAIGN CRISIS, BUT TONIGHT SHOWING NO SIGN HE IS PREPARING TO END HIS RE-ELECTION RUN. TODAY IN WISCONSIN, THE PRESIDENT SAYING, DESPITE SOME DEMOCRATS TRYING TO PUSH HIM OUT, HE'S STAYING IN THE RACE, BUT TONIGHT IT APPEARS HIS SUPPORT IS ERODING FURTHER AMONG ELECTED LEADERS. "THE WASHINGTON POST" REPORTS THAT KEY SENATOR MARK WARNER OF VIRGINIA IS TELLING OTHER DEMOCRATS THAT MR. BIDEN CAN NO LONGER REMAIN IN THE RACE, AND WARNER IS TRYING TO PUT TOGETHER A GROUP OF DEMOCRATIC SENATORS TO ASK THE PRESIDENT TO BOW OUT. WARNER'S SPOKESPERSON NOT CONFIRMING OR DENYING THAT REPORT. >>> ALSO TONIGHT, THE PRESIDENT IS SPEAKING ABOUT THE ISSUE IN A PRIMETIME INTERVIEW. PLUS, HE'S PLANNING A PRESS CONFERENCE NEXT WEEK AS SOME DEMOCRATS DEMAND HE ACT QUICKLY TO SHOW HE HAS THE MENTAL FITNESS TO CONTINUE THIS CAMPAIGN. IT'S WHERE WE START TONIGHT WITH GABE GUTIERREZ IN WISCONSIN. >> Reporter: WITH HIS CANDIDACY HANGING IN THE BALANCE, TONIGHT PRESIDENT BIDEN LOOKING FOR A LIFELINE IN BATTLEGROUND WISCONSIN, EIGHT DAYS AFTER THAT DISASTROUS DEBRIS. >> CAN'T SAY IT WAS MY BEST PERFORMANCE. BUT EVER SINCE THERE'S BEEN A LOT OF SPECULATION. WHAT'S JOE GOING TO DO? IS HE GOING TO STAY IN THE RACE? WELL, HERE'S MY ANSWER, I AM RUNNING AND GOING TO WIN AGAIN. [ CHEERS AND APPLAUSE ] >> Reporter: THE PRESIDENT SPEAKING WITH A TELEPROMPTER AT A RALLY IN MADISON ADDRESSING CONCERNS ABOUT HIS AGE. HEAD-ON. >> YOU THINK I'M TOO OLD TO BEAT DONALD TRUMP? >> All: NO! >> Reporter: PRESSURE HAS BEEN MOUNTING ON THE 81-YEAR-OLD COMMANDER IN CHIEF WHILE SOME DEMOCRATS HAVE CALLED FOR HIM TO STEP ASIDE, OTHERS ARE WEIGHING THEIR OPTIONS. VIRGINIA SENATOR MARK WARNER NOW ORGANIZING A GROUP OF HIS COLLEAGUES TO MEET TO DISCUSS WHAT THEY BELIEVE THE PATH FORWARD FOR THE PRESIDENT SHOULD BE. >> FROM MY POINT IT'S WARNER WHO IS THE ONLY ONE CONSIDERING THAT. >> Reporter: BIG MONEY DONORS ALSO THREATENING TO YANK THEIR CASH FROM THE CAMPAIGN. >> THEY'RE TRYING TO PUSH ME OUT OF THE RACE. WELL, LET ME SAY THIS AS CLEARLY AS I CAN, I'M STAYING IN THE RACE. >> Reporter: NERVOUS SUPPORTERS AS WELL AS HIS CRITICS NOW SCRUTINIZING HIS EVERY WORD INCLUDING THIS STUMBLE AT LAST NIGHT'S JULY 4th CELEBRATION. >> NANCY PELOSI FRAMED THE QUESTION, WAS THIS A BAD EPISODE OR A SIGN OF A MORE SERIOUS CONDITION? >> IT WAS A BAD EPISODE. NO INDICATION OF ANY SERIOUS CONDITION. I WAS EXHAUSTED. I DIDN'T LISTEN TO MY INSTINCTS IN TERMS OF PREPARING AND A BAD NIGHT. >> YOU KNOW, YOU SAY YOU WERE EXHAUSTED AND I KNOW YOU SAID THAT BEFORE AS WELL BUT YOU CAME AND DID HAVE A TOUGH MONTH BUT CAME HOME FROM EUROPE ABOUT 11 OR 12 DAYS BEFORE THE DEBATE, SPENT 6 DAYS IN CAMP DAVID. WHY WASN'T THAT ENOUGH REST TIME, ENOUGH RECOVERY TIME? >> BECAUSE I WAS SICK AND WAS FEELING TERRIBLE. AS A MATTER OF FACT, THE DOCS WERE WITH ME AND DID A COVID TEST AND DID A TEST TO SEE WHETHER OR NOT I HAD SOME INFECTION, YOU KNOW, A VIRUS, I DIDN'T. I JUST HAD A REALLY BAD COLD. >> Reporter: NERVOUS SUPPORTERS AS WELL AS HIS CRITICS NOW SCRUTINIZING HIS EVERY WORD INCLUDING THIS STUMBLE AT LAST NIGHT'S JULY 4th CELEBRATION. >> I PROBABLY SHOULDN'T EVEN SAY AT ANY RATE. >> Reporter: MEETING WITH DEMOCRATIC GOVERNORS, THE PRESIDENT'S SUGGESTED HE'D LIKE THEM TO LIMIT HIS VISITS UNTIL 8:00 P.M. SO HE CAN GET MORE REST. ONE IS URGING HIM TO CAREFULLY EVALUATE WHETHER TO STAY IN THE RACE AND NBC NEWS IS REPORTING SOME DEMOCRATS SAY THE PRESIDENT'S DEBATE PERFORMANCE WAS NOT AN ANOMALY. ONE DEMOCRATIC SENATOR WHO DECLINED TO SPEAK PUBLICLY TELLING US, THE COUNTRY SAW WHAT THOSE OF US WHO HAVE HAD PERSONAL INTERACTIONS WITH HIM HAVE ALL KNOWN FOR THE LAST 2 1/2 YEARS. TO COUNTER THAT NARRATIVE, TODAY THE BIDEN CAMPAIGN ANNOUNCING AN AGGRESSIVE TRAVEL SCHEDULE AND $50 MILLION PAID MEDIA BLITZ TO REACH VOTERS. >> DO YOU BELIEVE THIS WAS -- >> I UNDERSTAND THE CONCERN, BUT I THINK IN THE LONG RUN, HE'LL PROVE PEOPLE WRONG. >> HOW TYPICAL WAS IT TO SEE THAT DEBATE PERFORMANCE? >> IT WAS VERY DIFFICULT, AND IN MY MIND I WAS MAKING ALL THE EXCUSES THAT A LOT OF BIDEN FANS WERE MAKING, BUT IN THE END IT'S MORE WHAT THE AMERICAN PEOPLE THINK, AND THAT'S WHAT SCARES ME. I THINK HE CAN DO IT. >> GABE JOINS US LIVE. THERE IS NEW REPORTING ON HOUSE DEMOCRATIC LEADER HAKEEM JEFFRIES AND HIS PLAN? >> Reporter: YES, TOM. MULTIPLE SOURCES TELL NBC NEWS THAT LEADER JEFFRIES IS CONVENING A VIRTUAL MEETING SUNDAY WITH DEMOCRAT COMMITTEE RANKING MEMBERS AND IS EXPECTED TO FOCUS ON PRESIDENT BIDEN AS HE FACES CALLS TO STEP ASIDE. TOM. >> GABE GUTIERREZ LEADING US OFF TONIGHT, GABE, THANK YOU. >>> WE WANT TO SWITCH GEARS. THE PATH OF THAT DEADLY HURRICANE BERYL NOW PROJECTED TO HIT SOUTH TEXAS AS MORE THAN 140 MILLION AMERICANS ARE SWELTERING THROUGH A DANGEROUS HEAT WAVE. HERE'S PRISCILLA THOMPSON. >> Reporter: BERYL RIPPING THROUGH THE GULF OF MEXICO TONIGHT. AFTER SLAMMING INTO THE YUCATAN PENINSULA AS A CATEGORY STORM WITH 100-MILE-PER-HOUR WINDS, THE MASSIVE SUMMER HURRICANE NOW TAKING AIM AT SOUTH TEXAS. >> WE'RE PREPARING FOR THE WORST, PRAYING, AND HOPING FOR THE LEAST AMOUNT OF RAIN. >> Reporter: THE STORM ALREADY BLAMED FOR AT LEAST NINE DEATHS AFTER TEARING THROUGH PARTS OF THE CARIBBEAN THIS WEEK, CARVING A PATH OF DESTRUCTION. >> I NEVER REALLY EXPERIENCED A SYSTEM LIKE THIS MAGNITUDE. >> Reporter: AT SOUTH PADRE ISLAND, TEXAS, THE STORM SENDING SOME VACATIONERS PACKING. >> WE'RE GETTING OUT BEFORE THE HURRICANE. >> Reporter: AS RESIDENTS COLLECT SANDBAGS AND PREPARE TO HUNKER DOWN. >> IT'S ALWAYS BETTER TO BE SAFE THAN SORRY. >> YEAH, YOU'RE NOT TAKING ANY CHANCES. >> JUST BEING PREPARED. >> Reporter: THIS AS 140 MILLION PEOPLE FACE HEAT ALERTS NATIONWIDE. MORE THAN 50 CITIES FROM THE PACIFIC NORTHWEST TO ARIZONA EXPECTED TO BREAK RECORD HIGHS. IN NORTHERN CALIFORNIA, ANOTHER WILDFIRE EXPLODING OVERNIGHT AMID TRIPLE-DIGIT TEMPERATURES. THIS ONE NEAR YOSEMITE NATIONAL PARK. THE FAST-MOVING FRINGE FIRE ALREADY FORCING EVACUATIONS. NBC'S STEVE PATTERSON IS THERE. >> HERE IN MARIPOSA COUNTY, WHOLE NEIGHBORHOODS ARE UNDER SIEGE. THIS CAME JUST FEET AWAY FROM THIS TOWN, FIREFIGHTERS ABLE TO STOP IT JUST IN THE NICK OF TIME. LOOK HOW CLOSE IT CAME TO THE FOOTBALL FIELD, MAYBE 15 FEET AWAY. >> Reporter: WILDFIRES, DANGEROUS HEAT, PLUS A HURRICANE ON THE MOVE, ALL MARKING WHAT COULD BE ANOTHER SUMMER OF EXTREME WEATHER. >> AND PRISCILLA THOMPSON JOINS US NOW LIVE FROM THE TEXAS BEACH THERE IN SOUTH PADRE ISLAND. PRISCILLA, BERYL HAS DOWNGRADED TO A TROPICAL STORM, BUT THE MESSAGE IS CLEAR FROM LEADERS IN SOUTH TEXAS. >> Reporter: THAT'S RIGHT, TOM. BERYL IS MOVING BACK INTO THE GULF OF MEXICO WHERE THE WATER IS UP TO 86 DEGREES, WHICH COULD FUEL RAPID INTENSIFICATION TURNING IT BACK INTO A HURRICANE BEFORE IT HITS TEXAS. TOM. >> ALL RIGHT, PRISCILLA THOMPSON FOR US, PRISCILLA, THANK YOU. >>> LET'S BRING IN BILL KARINS, WHO IS TRACKING IT ALL. AND, BILL, CONCERN IS GROWING FOR TEXAS. >> YEAH, LIFE-THREATENING WEATHER CONDITIONS ARE EXPECTED DURING THE DAYLIGHT HOURS ON MONDAY. WE'RE TRYING TO PIN EXACTLY WHO IS MOST AT RISK BUT A LOT OF PEOPLE WILL HAVE TO PREPARE THIS WEEKEND. YES, IT'S A TROPICAL STORM, BUT WE HAVE A LITTLE LESS FOR IT TO REINTENSIFY. THE HURRICANE CENTER HAS IT DOING JUST THAT A 90-MILE-PER-HOUR HURRICANE MAKING LANDFILL BETWEEN BROWNSVILLE AND HOUSTON. ALL OF OUR SPAGHETTI LINES WE'VE BEEN TRACKING ARE COMING INTO EXCELLENT AGREEMENT IN THAT GENERAL VICINITY. SO, HOUSTON, YOU'RE IN PLAY WITH HEAVY RAINFALL WITH THIS TOO ALONG WITH THE EASTERN HALF OF THE CIRCULATION. ISOLATED TOTALS COULD BE UP TO A HALF A FOOT TO TEN INCHES. IF YOU KNOW HOUSTON, THAT MEANS WE COULD HAVE SERIOUS PROBLEMS. AS FAR AS THE HEAT, WATCH THE WEST, AREAS IN THE DESERT COULD HEAD TO ALL-TIME RECORD HIGHS. >>> WHAT'S EXPECTED TO BE RECORD-BREAKING TRAVEL THIS HOLIDAY WEEKEND BOTH ON THE ROADS AND IN THE AIR. PRIYA SRIDHAR IS IN ATLANTA, AND, PRIYA, HOW IS IT LOOKING THIS WEEKEND? >> Reporter: HEY, TOM. I'M AT ATLANTA HARTSFIELD-JACKSON, BUSIEST AIRPORT IN THE WORLD, AND THIS WEEKEND TRAVEL NATIONWIDE COULD MAKE HISTORY. TSA PROJECTING 3 MILLION PEOPLE WILL PASS THROUGH THEIR CHECKPOINTS ON SUNDAY, WHICH WOULD BE THE MOST EVER. SUNDAY IS ALSO EXPECTED TO BE THE BUSIEST DAY ON THE ROADS WITH THE RECORD-BREAKING 60 MILLION PEOPLE DRIVING 50 MILES OR MORE AWAY FROM HOME THIS WEEK. TRAVEL EXPERTS SAY THE BEST TIME TO DRIVE ON SUNDAY IS BEFORE 11:00 A.M., AND TUESDAY WILL BE THE BEST DAY TO FLY HOME. ALSO TRY TO KEEP IT SIMPLE AND TRAVEL WITH JUST A CARRY-ON TO AVOID LONG LINES TO CHECK IN YOUR LUGGAGE. TOM. >> OKAY, PRIYA. >>> HERE IN NEW YORK, A FOURTH OF JULY CELEBRATION ENDED IN TRAGEDY AFTER A SUSPECTED DRUNK DRIVER KILLED THREE AND INJURED SEVERAL HOURS. GEORGE SOLIS HAS THE LATEST ON THE INVESTIGATION. >> Reporter: THIS VIDEO SHOWS THE TERRIFYING MOMENT S BEFORE A SUSPECTED DRUNK DRIVER PLOWED THROUGH A NEW YORK CITY PARK FILLED WITH FAMILIES CELEBRATING JULY 4th. WATCH AGAIN. THE PICKUP TRUCK ZOOMS PAST A PEDESTRIAN AND BLOWS THROUGH A STOP SIGN, THEN YOU SEE THE SPARKS FLY AS THE TRUCK CRASHES INTO THE PARK TRAPPING PEOPLE UNDERNEATH. >> THE OFFICERS WHO DID ARRIVE ON THE SCENE DID SMELL SOME ALCOHOL. >> Reporter: TWO WOMEN AND ONE MAN DIED INCLUDING LUCILLE PINCKNEY AND HER SON, HERMAN. EIGHT OTHERS WERE INJURED. >> HOW MUCH DID YOU HAVE TO DRINK? >> Reporter: TONIGHT, FUELED BY OUTRAGE AND HEARTBREAK, LOVED ONES OF THOSE KILLED SCREAMING AT THE SUSPECT. >> THERE'S A SON AT HOME WITH NO MOTHER AND NO BROTHER. >> Reporter: AUTHORITIES CHARGING DANIEL HIDEN WITH UNDER THE INFLUENCE. HE SUFFERED THESE INJURIES IN THE CRASH AND WORKS AS A SUBSTANCE ABUSE COUNSELOR AND EVEN WROTE THIS BOOK ABOUT LIVING WITH ADDICTION. HE'S NO STRANGER TO LEGAL TROUBLES, ARRESTED IN FEBRUARY FOR ASSAULT AND COURT RECORDS SHOW IN 2015 HE PLED GUILTY TO A DRUNK DRIVING CHARGE IN WISCONSIN. NO WORD YET ON AN ATTORNEY FOR THE SUSPECT. THE SUSPECT ALSO FACES ADDITIONAL CHARGES OF VEHICULAR HOMICIDE, ASSAULT, AND DRIVING WITHOUT A LICENSE. TOM. >> OKAY, GEORGE. >>> NOW TO THE STUNNING SHIFT IN POWER IN GREAT BRITAIN. A NEW PRIME MINISTER WINNING ELECTION IN A LANDSLIDE. RAF SANCHEZ IS IN LONDON FOR US. >> Reporter: TONIGHT, BRITAIN'S NEW PRIME MINISTER ARRIVING AT BUCKINGHAM PALACE. >> YOUR MAJESTY. >> Reporter: KEIR STARMER MEETING WITH KING CHARLES BEFORE HEADING TO DOWNING STREET TO TAKE OFFICE. >> I HAVE NO DOUBT THAT WE WILL REBUILD BRITAIN. OUR WORK IS URGENT, AND WE BEGIN IT TODAY. >> Reporter: SAVORING THE APPLAUSE BEFORE GETTING TO WORK. THIS IS IT, BRITAIN'S NEW PRIME MINISTER AND HIS WIFE WALKING THROUGH THAT FAMOUS BLACK DOOR OF DOWNING STREET FOR THE FIRST TIME. STARMER'S PROGRESSIVE LABOUR PARTY WINNING A SWEEPING MAJORITY. OUSTING INCUMBENT PRIME MINISTER RISHI SUNAK. >> I HAVE HEARD YOUR ANGER, YOUR DISAPPOINTMENT, AND I TAKE RESPONSIBILITY FOR THIS LOSS. >> Reporter: WHOSE CONSERVATIVES SUFFERED THEIR WORST DEFEAT IN TWO CENTURIES, PUNISHED BY VOTERS ANGRY OVER ISSUES ALSO FACING THE U.S. LIKE INFLATION AND IMMIGRATION AND EXHAUSTED AFTER THE CONSERVATIVES CYCLED THROUGH FOUR OTHER PRIME MINISTERS SINCE 2016, AND PRIME MINISTER STARMER SPEAKING TO PRESIDENT BIDEN EARLIER TODAY. THE TWO LEADERS REAFFIRMING THEIR JOINT SUPPORT FOR UKRAINE, AND THEY'LL MEET NEXT WEEK AT THE NATO SUMMIT IN WASHINGTON. TOM. >> OKAY, RAF, THANK YOU. >>> WHEN WE COME BACK, WE'LL HEAR FROM A SURVIVOR OF THOSE HOLIDAY SHARK ATTA >>> >>> WELCOME BACK. >>> WE WANT TO GO TO TEXAS WHERE OFFICIALS ARE ADVISING HOLIDAY BEACHGOERS AT SOUTH PADRE ISLAND TO STAY OUT OF THE WATER AFTER MULTIPLE SHARK ATTACKS. MORGAN CHESKY TONIGHT SPEAKING WITH A SURVIVOR WHO FOUGHT ONE OFF, AND A WARNING, SOME OF THESE IMAGES ARE GRAPHIC. >> Reporter: PANIC ON SOUTH PADRE ISLAND FOLLOWING ONE OF SEVERAL SHARK ATTACKS. >> I CAN'T IMAGINE THAT I ACTUALLY WOULD HAVE A SHARK ATTACK. IT'S KIND OF CRAZY. >> Reporter: HOLIDAY BEACHGOERS WATCHING IN HORROR AS THEY PULLED TABATHA SULLIVENT FROM THE WATER BLEEDING FROM A VICIOUS BITE TO THE LEG. >> I JUST THOUGHT IT WAS A BIG FISH, SO I WENT TO KICK TO KIND OF KICK IT AWAY, AND AT THAT POINT I THINK IT'S WHEN IT BIT ME. HAD I NOT PULLED MY LEGS UP, PROBABLY WOULD HAVE GOT MY TORSO OR SOMETHING ELSE. >> Reporter: KYLE JUDD CAUGHT THE AFTER MATH OF THE ATTACK INCLUDING THE SHARK RESPONSIBLE. >> TO WITNESS THE SHARK STAY SO CLOSE. >> IT WAS CRAZY. HE WAS LITERALLY CIRCLING RIGHT IN FRONT AS THEY WERE TREATING HER ON THE BEACH. >> Reporter: JUST DOWN THE BEACH VICTORIA RAMOS SHARED HER OWN FRIGHTENING CLOSE CALL. >> LITERALLY BITE MARKS ON MY CALF, BUT I'M ALL RIGHT. >> Reporter: IN FLORIDA ANOTHER VICTIM RECOVERING AFTER OFFICIALS SAY A SHARK BIT A MAN'S FOOT AT NEW SMYRNA BEACH IN KNEE-DEEP WATER. EXPERTS STRESS, VIOLENT SHARK ENCOUNTERS REMAIN INCREDIBLY RARE WITH 36 UNPROVOKED ATTACKS REPORTED NATIONWIDE LAST YEAR. TABATHA CREDITS HER HUSBAND FOR SAVING HER LIFE. >> WELL, HE FOUGHT OFF A SHARK FOR ME. I MEAN, THAT'S PRETTY IMPRESSIVE. >> Reporter: WITH SURGERY, SHE NOW HOPES TO MAKE A FULL RECOVERY. >> I'M THANKFUL FOR ALL THE SUPPORT, AND I'M ALIVE. >> Reporter: AND TONIGHT WE JUST CONFIRMED THE SECOND SHARK ATTACK IN TWO DAYS AT NEW SMYRNA BEACH THAT LEAVES ONE MAN HOSPITALIZED. THEY SAY IF YOU ARE ATTACKED BY A SHARK, FIGHT BACK AND TARGET THE EYES, NOSE OR ITS GILLS. TOM. >> MORGAN CHESKY WITH ADVICE FOR US, THANK YOU. >>> COMING UP, THE >>> AS WE APPROACH THE HEART OF SUMMER, A WARNING TONIGHT, THERE'S DANGEROUS MISINFORMATION ABOUT SUNSCREEN CIRCULATING ON SOCIAL MEDIA. ANNE THOMPSON ON WHAT YOU NEED TO KNOW TONIGHT. >> Reporter: JUST IN TIME FOR THE DOG DAYS OF SUMMER, A WAVE OF MISINFORMATION ABOUT SUNSCREEN FLOODING SOME SOCIAL MEDIA SITES. >> THE SUN DOES NOT CAUSE SKIN CANCER. >> I THINK SUNSCREEN CAUSES SKIN CANCER. >> SUNSCREEN IS A SCAM. >> Reporter: AS A TEENAGE LIFEGUARD, JESSICA JORDAN SAID SUNSCREEN WAS NOT A PRIORITY. >> WHEN I WAS YOUNGER I DIDN'T WEAR SUNSCREEN. I WAS IN THE SUN 24/7. >> Reporter: IN HER LATE 30s, SHE SAYS SHE PAID THE PRICE. >> I HAVE BASAL CELL CARCINOMA. THERE IS SO MUCH SKIN DAMAGE THAT IT CANNOT BE UNDONE. >> Reporter: THAT'S WHAT DERMATOLOGISTS LIKE JENNIFER STEIN WANT PEOPLE TO AVOID. >> DAMAGE CAN ACCUMULATE IN YOUR SKIN, WHICH EVENTUALLY COULD CAUSE SKIN CANCER AND DEFINITELY AGES THE SKIN, GIVES YOU BROWN SPOTS AND WRINKLES. >> Reporter: SKIN CANCER IS THE MOST COMMON FORM OF CANCER IN THE U.S. WITH 9,500 PEOPLE DIAGNOSED EVERY DAY. THE MOST SERIOUS MELANOMA IS EXPECTED TO KILL SOME 8,000 PEOPLE THIS YEAR. SUNSCREEN CAN PROTECT YOU. THERE ARE TWO KINDS, CHEMICAL AND MINERAL. IN CHEMICAL ABSORBING INGREDIENTS, OXYBENZONE AND OCTINOXATE, CAN HAVE TOXIC EFFECTS ON MARINE LIFE. THEY ARE BANNED IN HAWAII, KEY WEST AND THE U.S. VIRGIN ISLANDS. >> IF THOSE CHEMICALS ARE A DANGER TO MARINE LIFE, ARE THEY DANGEROUS TO HUMANS? >> RIGHT NOW WE DON'T KNOW. THERE'S A QUESTION MARK, SO IF YOU'RE NOT SURE, YOU CAN GO WITH THE PHYSICAL SUNSCREENS FOR NOW. >> Reporter: THOSE ARE MINERAL SUNSCREENS WITH ZINC OXIDE AND TITANIUM DIOXIDE AND DOCTORS SAY YOU SHOULD USE A WATER-RESISTANT BROAD SPECTRUM SUNSCREEN WITH AN SPF OF AT LEAST 30 AND APPLY IT EVERY TWO HOURS, PREVENTION TO MAKE SURE YOUR FUN IN THE SUN IS SAFE. ANNE THOMPSON, NBC NEWS. >>> FINALLY, THEY CROSSED OCEANS, RIVERS, AND FLED FROM THE TALIBAN, ALL OF IT SO THEIR DAUGHTER COULD GET AN EDUCATION. WHAT THAT YOUNG WOMAN JUST ACCOMPLISHED AND WHERE SHE'S HEADED NEXT. HERE'S ERIN McLAUGHLIN. >> Reporter: FOR MOST AMERICAN HIGH SCHOOL SENIORS, GAD SITUATION BUT FOR ZAHRA SHAHNOORY -- >> RESILIENCE KNOWS NO BOUNDS. >> Reporter: -- IT IS A CHANCE TO BREAK A CYCLE OF OPPRESSION. >> THIS GRADUATION IS JUST FOR MY WHOLE FAMILY, FOR ALL THE GIRLS IN AFGHANISTAN. >> Reporter: A YEAR AGO ZAHRA AND HER FAMILY ARRIVED IN THE UNITED STATES FROM AFGHANISTAN HAVING FLED HER NATIVE COUNTRY SHORTLY AFTER KABUL FELL TO THE TALIBAN. SHE WAS IN SCHOOL WHEN IT HAPPENED. >> IT WAS SO SCARY. I HAD MY TEXTBOOKS, AND I DIDN'T KNOW THAT WHAT WOULD HAPPEN TO ME, SO I HID THEM UNDER MY SCARF. >> Reporter: THE TALIBAN BANNED GIRLS FROM ATTENDING HIGH SCHOOL. ACCORDING TO UNESCO, 80% OF ALL AFGHAN GIRLS WERE NOT IN SCHOOL AS OF 2023, BUT ZAHRA'S FAMILY'S DECISION TO FLEE THEIR HOMELAND WAS MORE THAN HER EDUCATION, THEY WERE TARGETED FOR THEIR RELIGION. >> YOU'RE SHIA. >> YES. >> AND THEY WANTED YOU DEAD. >> EXACTLY. >> Reporter: AND SO BEGAN A LONG AND PERILOUS JOURNEY TO THE UNITED STATES. SHE SAYS HER WHOLE FAMILY NEARLY DROWNED WHEN THEIR BOAT CAPSIZED OFF THE COAST OF PANAMA. >> WE WERE IN WATER FOR FOUR HOURS. I FEEL THAT I'M NOT AFRAID OF DYING BUT I'M AFRAID OF BEING -- >> Reporter: THEY RESCUED BY FELLOW MIGRANTS AND NOW RESIDE IN A SHELTER IN NEW YORK CITY. HER FAMILY BEAMING WITH PRIDE WHEN ZAHRA RECENTLY GRADUATED HIGH SCHOOL WITH HONORS. ZAHRA SAYS FROM HERE HER MISSION IS CLEAR. >> I WILL DO MY BEST TO DO FOR MY GIRLS AND WOMEN IN AFGHANISTAN EVERYTHING POSSIBLE. >> Reporter: ERIN McLAUGHLIN, NBC NEWS, NEW YORK. >> AND CONGRATULATIONS TO ZAHRA AND HER FAMILY. THAT'S "NIGHTLY NEWS" FOR THIS FRIDAY. I'M TOM LLAMAS. THANK YOU SO MUCH FOR WATCHING THIS WEEK. HAVE A GREAT NIGHT.
