Protect yourselves. Close your windows. Don't hang around outside. The reason: the Department of Health is going to spray against West Nile virus between 8:00 tonight and 6:00 tomorrow morning in parts of these zip codes: 1203, 11208, 11215, 11217, 11218, 11219, 11225, 11226, 11232, 11238.
This is ground-based spraying of Anvil 10+10 (Sumithrin) from trucks. The map above (and at http://www.nyc.gov/html/doh/images/wnv/wnv-notice-20140916-map-bk.jpg) shows the boundaries of the area that will be sprayed.
If spraying can't be done tonight because of weather conditions (rain, high winds) or equipment malfunctions, it'll be done between 8:00 p.m. tomorrow and 6:00 a.m. Thursday.
"Anvil is applied at very low concentrations to control mosquitoes. It is unlikely that adverse health effects will occur as a result of this use for most people, but some individuals may experience health effects. For these reasons, individuals should consider taking steps to minimize their exposure to Anvil if it is applied to control mosquitoes." https://www.health.ny.gov/publications/2738