"Memorial Day is the unofficial start of summer," said State Fire Marshal Peter J. Ostroskey. "Many people are anticipating activities with family and friends, and getting their yards and grills ready for gatherings. Take a few minutes for safety and have a wonderful Memorial Day weekend."Grilling safety tipsBetween 2014 and 2018, Massachusetts fire departments responded to 474 fires involving grills, hibachis, and barbecues.