No one was injured or arrested, said Watsonville police Sgt. Henry Robles. The fields and road were reopened about 5 p.m.
About 2:55 p.m., emergency dispatchers received a 911 call from someone in a home on the 300 block of Riverside. The caller said her brother threatened suicide and that he might have a gun and shoot a family member.
Police and Santa Cruz County Gang Task Force members surrounded the home and eventually contacted the man by phone.
Police did not go in the house and decided to "back out" of the property about 5 p.m. to help defuse the situation, Robles said. Police were familiar with the man but it was unclear if he had a gun at the home.
"We hope to recover the handgun or have a family member surrender the handgun," Robles said.
Watsonville police sent Nixle alerts to subscribers about the closed road.