SAN JUAN, Puerto Rico — Heavy rains continued to lash Puerto Rico and flash flood warnings persisted across the U.S. territory, submerging streets, stranding families and causing at least one death this weekend, authorities said on Sunday.

A 44-year-old man was killed and a 43-year-old woman hospitalized when a tree fell on their car as they were driving in the northern town of Toa Baja at 8:10 p.m. local time on Saturday, police said the next day, as the fierce rains that have pounded Puerto Rico for two weeks triggered a landslide.

That brings the total death toll from the rains over the past weeks to two, after a man who tried to drive his car through floodwaters was swept away and killed April 28.

At least five municipalities across the island declared a state of emergency.

Local authorities said they delivered groceries and nonperishable goods to the hardest-hit neighborhood there, which also was experiencing problems with water service. Officers worked to reroute traffic and close roads that quickly filled with rippling layers of murky brown water Sunday.

— The Associated Press