Three pedestrians were struck and injured by drivers, one of them fatally, in the space of a few rainy hours in San Francisco Tuesday night.

A 64-year-old woman identified by the medical examiner as San Francisco resident Zhao Guan was struck by a westbound driver at California Street and 18th Avenue in the Richmond District just after 8 p.m. as she crossed in the crosswalk, according to police.

She was taken to the hospital but died of her injuries, police said.

The driver, who was in a silver sedan, fled the scene and remained at large as of Wednesday morning.

At 10:27 p.m., a driver in a large box truck struck a 47-year-old man at First and Howard streets in the South of as he crossed the street.

The victim, who was pinned under the truck and dragged half a block, was taken to the hospital with life-threatening injuries.

Police have arrested the driver, a 40-year-old man, but did not immediately release his identity Wednesday morning.

Just minutes later, at 10:30 p.m., a driver in a black SUV struck a 65-year-old woman at California and Polk streets in the Polk Gulch area.

The woman, who suffered a head injury, is expected to survive but does not remember what happened, police said.

The driver fled the scene and had not yet been located as of Wednesday morning.