If you live in Washington Heights, you'll want to stay indoors tonight. The Health Department will be spraying pesticide as a preventive bid against the West Nile virus. The Post reports that the spraying (of Anvil 10+10) will be at Trinity Cemetery between 8PM and 6AM.

While there are no reported cases of people with the West Nile virus yet, the Health Department has been spraying parts of Queens, the Bronx and Staten Island this summer. Here are some tips from the Health Department:

• Use an approved insect repellent containing DEET, picaridin or oil of lemon eucalyptus. (Products containing oil of lemon eucalyptus should NOT be used on children younger than three.) Use these products according to manufacturers’ instructions.
• Make sure windows have screens, and repair or replace screens that have tears or holes.
• Eliminate any standing water from your property, and dispose of containers that can collect water. Standing water is a violation of the New York City Health Code.
• Make sure roof gutters are clean and draining properly.
• Clean and chlorinate swimming pools, outdoor saunas and hot tubs. Keep them empty and covered if not in use; drain water that collects in pool covers.
• Report dead birds or standing water by calling 311 or visiting http://www.nyc.gov/health/wnv

Last year, the first case of West Nile was on Staten Island. And two years ago, some people contracted West Nile through organ donation.