LOS ANGELES (AP) — Los Angeles County reports the fifth straight day of more than 1,000 new coronavirus cases.

Health officials warned Tuesday that the especially contagious delta variant of the disease continues to spread rapidly among California’s unvaccinated population.

The nation’s most populous state reported 3,256 COVID-19 cases — the highest one-day total since early March. LA County, where a quarter of California’s 40 million people live, reported a new caseload totaling 1,103. County officials said the five-day average of cases is 1,095 — a jump of more than 500% in just one month.