A golfer on the second hole at Ibis Golf and Country Club died instantly after being struck by lightning, police said.
Jong Bae Suh, 53, of nearby Wellington was following through on his swing when a bolt of lightning struck his club Saturday, police said.
Suh was playing with four other men when the storm broke out shortly after 4 p.m.
The National Weather Service had just issued a severe thunderstorm warning for northern Palm Beach County though such violent and fast-approaching storms are not uncommon for South Florida in summer.
The group found shelter and when the rain subsided, returned to the game. Another player about 30 feet from Suh felt the heat from the bolt but was not injured, police said.
Florida has the highest number of lightning-related deaths in the nation. Saturday's death is believed to be the second caused by lightning in Palm Beach County this year.
In April, an 84-year-old Lantana woman died of smoke inhalation after lightning struck her home and sparked a fire in the attic.
Also Saturday, at least two twisters touched down in the western part of Martin County, sheriff's officials reported. No one was injured and there were no reports of property damage related.