Collin County has recorded the first death of a person who contracted West Nile virus.
Plano officials said a woman in her 80s from zip code 75025 has died. No further information is expected to be released because of patient confidentiality.
Ground crews were spraying three Plano neighborhoods for mosquitoes on Tuesday night. (See a map of the area being sprayed.)
As of Tuesday, 39 people have been sickened by West Nile virus in Collin County. More than 600 have contracted the virus across North Texas this summer.
Residents are encouraged to report areas of standing water and mosquito breeding grounds to the county's West Nile hotline at 972-548-5525.
NBC 5's Ellen Goldberg contributed to this report.
Find complete coverage of the outbreak of West Nile virus in North Texas in our special section.