Five birds with WNV were discovered before the start of May, according to the county Department of Environmental Health.
The total of 29 for the year is the highest in the state. The county didn't find 29 WNV-positive birds last year until late October.
"These are signs that 2015 might be another tough year in our county for West Nile virus, so people should remember to protect themselves and their families," said DEH Director Elizabeth Pozzebon. "Get rid of standing water around properties where mosquitoes can breed, wear insect repellent when outdoors and report dead birds."
Last year, 11 San Diegans contracted WNV and two died. In a recent prior years, no local cases were reported.
Statewide, more than 800 people were diagnosed with the virus in 2014 and 31 died. No one has caught the illness in California this year, according to state health officials.
West Nile virus is spread to birds and humans by mosquitoes, and the county has an eradication program in place. Residents are also encouraged to help out by dumping water out of outdoor pots and saucers, wheelbarrows, old tires and rain gutters.
Four out of five people bitten by a mosquito carrying WNV won't have symptoms. Of those who do get sick, most will have a mild headache, fever, nausea, skin rash or swollen glands.
The symptoms turn life-threatening in one out of 150 cases, mainly for people over 50 years old or those with weakened immune systems.
A Ramona man was arrested Thursday on suspicion of stealing tip jars from a half-dozen Poway businesses.
People who take their pets to Del Mar's dog beach wanted to know who planted the incredible garden there.
Local first-responders who put their lives on the line to help victims of the deadly Montecito mudslides were back home Thursday.
A man accused of stabbing a woman to death near an Encanto Park made his first court appearance Thursday.
The San Diego Blood Bank Thursday solicited donations through the end of the month in honor of Father Joe Carroll, who will undergo surgery Feb. 1 due to complications with diabetes.
If you need ideas to help you keep that New Year's resolution going head to Santee for an active lifestyle expo and race this Saturday.
A new construction phase begins for the Mid-Coast Trolley. The Mid-Coast Trolley is an 11-mile extension of the San Diego Trolley Blue Line with service from Santa Fe Depot in downtown San Diego to UC San Diego and University City.
More than 200 local restaurants are trying to impress you next week. San Diego Restaurant Week kicks off Sunday.