A 33-year-old woman and her child are in critical condition after a single-car crash Tuesday night on Kauai.

Police said the woman was driving a Nissan sedan northbound on Kuhio Highway in Kilauea and apparently veered off the roadway shortly before 9 p.m.. The vehicle struck a guardrail before it slammed into a tree.

Police said the woman and her daughter, 6, who was in the back seat, suffered severe injuries and were transported to Wilcox Hospital. The child was later medevaced to Queen’s Medical Center.

Police said alcohol appears to be a factor in the crash.