♪♪♪ >> Patricia: WE BEGIN WITH A WARNING ABOUT THE DANGERS OF SHOVELLING SNOW. >> Graham: IT HAPPENED IN RENFREW COUNTY. NOW OFFICIALS HERE IN OTTAWA ARE REMINDING US THAT THE MUNDANE WINTER CHORE CAN BE DEADLY. CTV'S DAVE CHARBONNEAU ON HOW TO STAY SAFE IN YOUR DRIVEWAY. >> Reporter: THE FIRST MAJOR SNOWSTORM OF 2024 TURNED OUT TO BE DEADLY. TWO PEOPLE IN RENN FEW COUNTY COLLAPSED WHILE SHOVELLING HEAVY, WET SNOW. >> I WENT THIS MORNING, A GENTLEMAN WAS OUT PLOWING SOME RESIDENTIAL SIDEWALKS NEAR A BUSINESS AND COLLAPSED. >> OTTAWA PARAMEDICS ALSO RESPONDED TO A MAN SUFFERING A CARDIAC ARREST. >> ON SATURDAY MORNING AROUND 9:30 PARAMEDICS RESPONDED TO MANATIC AFTER A MALE THAT WAS CLEARING HIS DRIVEWAY WITH A SNOW EMPLOYER WAS FOUND IN CARDIAC ARREST BY HIS NEIGHBOUR SO WE WOULD SEE A CHANGE IN RHYTHM. >> Reporter: PARAMEDICS REVIVED THE MAN, HE WAS RUSHED TO HOSPITAL IN CRITICAL CONDITION. SHOVELLING SNOW CAN BE VERY DANGEROUS, ESPECIALLY WITH PEOPLE WITH HEART CONDITIONS. >> EVERY YEAR, FIRST SNOWFALL OR SUBSEQUENT SNOWFALLS, THE HEART INSTITUTE IS A VERY, VERY BUSY PLACE. >> Reporter: EXPERTS SAY USING PROPER FORM WHEN SHOVELLING CAN HELP PREVENT INJURY. >> IF YOU'RE LIFTING AND THROWING, WELL, YOU'RE GOING TO WANT TO BEND YOUR KNEES, BE BACK FRIENDLY AND THROW IT IN FRONT OF YOU. >> Reporter: AND TO TAKE EXTRA PRECAUTION WHEN SNOW IS HEAVY AND WET. SHAWN MAURICE IS CLEANING UP WHAT LITTLE SNOW IS LEFT FROM SATURDAY'S SNOW. >> HERE IS THE HARD PART. >> Reporter: BUT HE KNOWS WITH THIS MUCH SNOW, IT CAN'T ALL BE DONE AT ONCE. >> I DO TAKE BREAKS, LIKE THE LAST STORM WE HAD, IT TOOK ME LIKE THREE HOURS TO CLEAN. >> Reporter: A 2017 STUDY BY THE CANADIAN MEDICAL ASSOCIATION REVEALED THAT SHOVELLING HEAVY SNOW CAN TAKE UP MORE THAN 75% OF THE MAXIMUM HEART RATE. THAT CLEARLY INCREASES RISK, ESPECIALLY FOR OLDER MEN. >> IF AT ANY TIME YOU START TO EXPERIENCE CHEST PAIN OR SHORTNESS OF BREATH YOU HAVE TO START IMMEDIATELY