Maui fire officials say the cane fires were intentionally set within an hour of each other Thursday night and early into Friday morning.
They say the first fire started just before 11 p.m. in Waikapu off Honoapiilani highway.
Four acres of crops were damaged in the first fire.
The second fire started less than an hour later at 11:44 p.m. on Pulehu Road about a mile above the landfill, destroying one acre of crops.
The third fire started about a half hour later on Kuihelani highway about 200 yards east of Maui Lani Parkway intersection.
Officials say damage estimates to about 9 acres of crops total $45,000.
Thousands gathered at the memorial to pay tribute to those who paid the ultimate sacrifice and to those who survived.
You may remember the story we did earlier this week about the Pearl Harbor survivor who was headed here from the mainland for the ceremony, he was bumped from the flight and didn't know if he would get here in time.
It may take drivers a little longer to get around this weekend. On Sunday, there will be lane and road closures for the Honolulu Marathon.