QUALIFIERS COMPETE AT PARIS OLYMPICS LATE NEXT MONTH. CAN'T WAIT. >>> SUMMER OFFICIALLY STARTS IN TWO DAYS, BUT ALREADY TENS OF MILLIONS OF AMERICANS ARE FACING EXTREME HEAT ADVISORIES WITH TEMPERATURES EXPECTED TO HOVER ROUND 90 DEGREES. CBS NEWS'S NAOMI RUCKM WITH HOW SOME ARE COPING WITH THE RECORD TEMPERATURES. >> Reporter: THE DOG DAYS OF SUMMER ARE ALREADY HERE, AS A MASSIVE HEAT WAVEB BLANKETS PARTS OF THE COUNTRY THIS WEEK. >> I LOOKED AT THE FORECAST, I SAW, ALL RIGHT, TOASTY. >> Reporter: IN CHICAGO, KIDS AND PARENTS BEAT THE HEAT AT THE SPLASH PAD. >> FIND SOMETHING YOU CAN DO OUTSIDE TO KEEP THEM COOL AND HAVE FUN. >> Reporter: WITH RECORD TEMPS WELL ABOVE 90 IN THE WINDY CITY, OFFICIALS ARE CHECKING IN ON UNHOUSED POPULATION&GIVING THEM INFORMATION ON WHERE THEY CAN GO TO COOL OFF. >> WE BRING WATER AROUND, IF THEY ARE NOT WILLING TO GO TO THE SHELTER WE TAKE THEM TO COOL ING CENTERS. >> Reporter: FURTHER NORTH IN DETROIT, PEOPLE SUN BATHING ON THE BEACH WERE SPLIT OVER THE SCORCHING TEMPERATURES. >> IT IS ALMOST UNBEARABLE. >> I AM ENJOYING IT. >> Reporter: HEALTH EXPERTS WARN THE HEAT CAN BE DANGEROUS, ESPECIALLY FOR VULNERABLE POPULATIONS, SUCH AS THE ELDERLY, THE UNHOUSED, PREGNANT PEOPLE, AND CHILDREN. SCHOOLS IN CENTRAL MASSACHUSETTS ENDED THE YEAR EARLY BECAUSE OF TEMPERATURES AND BOSTON IS TAKEING IT DAY BY DAY. >> THERE ARE BOUT TEN SCHOOLS THAT DON'T HAVE AIR CONDITIONING IN THE BUILDING. >> Reporter: IN PARTS OF NEW YORK, SOME SCHOOLS MOVED TO HALF DAYS. >> NOT FAIR TO THE KIDS OR STAFF TO BE IN THERE, WHEN IT IS THIS HAUTZ. >> Reporter: WITH HURRICANE SEASON ALSO UNDER WAY, PARTS OF TEXAS ARE NOW PREPARING FOR A POTENTIAL TROPICAL STORM SYSTEM THIS WEEK. CBS NEWS, NEW YORK. >>> THE CENTER FOR BIOLOGICAL DIVERSITY AND OTHER GROUPS SENT A PETITION TO FEMA ASKING THE AGENCY TO INCLUDE EXTREME HEAT AND WILDFIRE SMOKE AS MAJOR DISASTERS. COM-ED HAS TIPS TO KEEP YOUR HOUSE TEMPERATURE AND ELECTRIC BILL LOW. THEY SAY TO ADJUST YOUR CEILING FANS COUNTERCLOCKWISE TO DIRECT COOL AIR TOWARD THE GROUND, AND THEN TURN IT OFF WHEN YOU LEAVE THE ROOM. MAKE SURE YOU HAVE A FRESH AIR FILTER, KEEP YOUR CURTAINS OR BLINDS CLOSED TO PREVENT HEAT FROM GETTING IN AND
