OFF THE CHARTS. SO ALL RIGHT. WELL, IT'S A LONG WEEKEND FOR SOME. AND IF YOUR PLANS INCLUDE BEING OUTDOORS, DOCTORS ARE WARNING ABOUT THE POTENTIAL FOR HEAT RELATED ILLNESSES. NIKKI SCHENFELD REPORTS. >> IT'S AN UNCOMFORTABLE START TO THE HOLIDAY WEEKEND. >> VERY HOT. THERE IS BARELY ANY BREEZE AND CERTAIN POINTS BECAUSE WE'RE BY A WALL OR SOMETHING. AND IT WAS IT FELT LIKE 100 SOME DEGREES. >> PEOPLE EVEN LEAVING THE UH FOOTBALL GAME AFTER HALFTIME DUE TO THE HEAT. >> AND GUYS TOO WE IMMEDIATELY SET DOWN ALIKE. IT WAS SO HOT AND WE'RE JUST BURNING UP. SO WE LOOK FOR WATER FOR LIKE. >> A GOOD 20 MINUTES. AND THEN FINALLY FOUND LIKE A CONCESSION STAND. THAT WAS GOOD. BUT EVERYWHERE WAS SOLD OUT SOME FANS TO PEOPLE BEING TAKEN OUT OF THE GAME ON STRETCHERS. >> HONOLULU, EMS IS IT TOOK A 49 YEAR-OLD MAN TO THE HOSPITAL IN SERIOUS CONDITION AFTER HE FAINTED AT THE GAME. PARAMEDICS SAY PEOPLE WERE TRYING TO COOL HIM OFF WHEN THEY ARRIVED. VISITORS AND RESIDENTS TRYING TO KEEP COOL AS HUMIDITY SORES DUE TO TROPICAL CYCLONE GILMA DISSIPATING NORTH OF THE STATES. >> AND THAT BROUGHT A LOT OF HUMID AND MOIST AIR. SO. YOU KNOW, THE HEAT INDEX IS REALLY HIGH. IT'S IN LOW 90'S. THE NATIONAL WEATHER SERVICE SAYS THIS ISN'T TYPICAL HAWAII HEAT AND THE HUMIDITY IS SO HIGH. >> THAT IT'S JUST LIKE BEING IN MIAMI THIS TIME OF YEAR. >> JUST VERY UNUSUAL FOR US. USUALLY HAVE, YOU KNOW, HIGH PRESSURE TO OUR NORTH AND EVEN OUR WATERS ARE, YOU KNOW, AS WARM AS THE GULF. SO TO GET REALLY THOSE WARM. DEW POINT TEMPERATURES, HE SAYS IT TAKES A TROPICAL SYSTEM TO CREATE THESE CONDITIONS. >> BUT WASN'T THE ONLY SYSTEM NEARBY. WE'RE ACTUALLY GOING TO GET THE REMNANT MOISTURE OF HECTOR THAT'S MOVING IN TONIGHT. SO THAT'S GOING TO KEEP THE DEW POINTS HIGH. SO IT'S GOING TO STILL FEEL MUGGY THROUGH SUNDAY. >> WHILE HUMIDITY CAN KEEP YOUR SKIN HYDRATED IT CAN CAUSE EXCESSIVE SWEATING, WHICH CAN LEAD TO DEHYDRATION. SOMETHING DOCTORS ARE CONCERNED ABOUT THIS HOLIDAY WEEKEND. >> IT'S REALLY, YOU KNOW, HUMID AND YOU KNOW, PEOPLE TEND TO LOSE A LOT OF HUMILITY, NOT AS WE'VE THAT'S WE ALL KNOW THAT RATE. SOON AS YOU STEP OUT OF THE HOUSE, YOU NEEDED THE STARTING TO SWEAT WHEN YOU START TO GET THIRSTY THAT SIGN RIGHT IN. SO YOU REALLY DO HAVE TO START PREPARING EVEN FROM THE NIGHT BEFORE, YOU KNOW, MAKING SURE THAT YOU, TOO, CAN FEEL LIKE THEY HAD A TYING AND ALSO NOT JUST WATER TO THEIR CASE. AND THAT RELATES. >> AS AN ER PHYSICIAN, SHE SAYS SHE SEES A LOT OF HEAT RELATED ILLNESSES LIKE HEAT EXHAUSTION AND HEAT STROKE. OFTENTIMES PEOPLE WILL START TO FEEL VERY THIS R-GA MUSCLE WEAKNESS, NAUSEA, VOMITING, HANDY GET THEM IN THE SHADE IN THE STREET DOWN, YOU KNOW, WITH COOL MIST OR EQUIPPED. HOWELL. >> YOU KNOW, AND OFTENTIMES, TOO, SIR, CAME TO AIR SOME BLOWING THE FACT, YOU KNOW, BECAUSE THAT HELPS TO IT KIND OF COOL DOWN THE BODY OF A QUICKER. >> IF YOU SEE SOMEONE BECOME CONFUSED OR DELIRIOUS, SHE SAYS BRING THEM TO A HOSPITAL RIGHT AWAY. PEOPLE WHO WANT TO HIKE THIS WEEKEND SHOULD BRING