This info is from the Department of Health & Mental Hygiene’s advisory email. I couldn’t find any additional info on the web site.
PESTICIDE SPRAYING – Bedford-Stuyvesant, Bushwick and East Williamsburg
Thurs. Aug. 5 btw the hours of 8:15pm – 6am the following morning, weather
permittingThe NYC Health Dept. plans to spray pesticide Anvil 10+10 to reduce the
number of mosquitoes in the following neighborhoods:Area Codes – 11206, 11221, 11237
Whenever possible stay indoors during spraying
Persons with asthma or other respiratory conditions are especially
encouraged to stay inside during sprayingAir conditioners may remain on. If you wish to reduce the risk of indoor
exposure, turn fans and air conditioners off or set air conditioner vent to
the closed position or recirculate functionRemove children’s toys, outdoor equipment & clothes from outside areas
Anyone experiencing adverse reactions should seek medical care or call the
NYC Poison Control Center at 212 – POISONSFor more info call 311 or visit www.nyc.gov/health
Alternate spray dates, weather permitting – Mon. Aug. 9 btw 8:15pm – 6am the
following morning.


Some more info on the Anvil poison:
http://www.health.state.ny.us/publications/2738/
http://www.mda.state.md.us/pdf/msdlabel/Anvill.pdf
Why the hell are they doing this? This poison is so dangerous!
Why these neighborhoods? Is there also a spraying of Brooklyn Heights or Boerum Hill? This stuff is toxic, we’re completely appalled this is even legal.