Two workers were injured by falling rocks and boulders at around 12:45 p.m. at the World War II-era storage bunkers in Waikele Gulch, officials said.

Two men, ages 50 and 52, were treated by paramedics and taken to a hospital in serious condition, Honolulu Emergency Medical Services said. The first patient had injuries to his head and arm, while the second received injuries to his leg.

Both were working outside the bunker when large rocks tumbled down during today’s heavy rain, officials said.

EMS said it responded to 94-990 Pakela St., which is listed as Storage Solutions Waikele Self Storage.