FYI - The West Nile Virus risk factor has been raised to HIGH in many Middlesex County communities, including Waltham

All residents are urged to take necessary safety precautions to avoid mosquito bites. Spraying for mosquitoes will take place tonight in various locations of Waltham (vicinity of Woodchester Rd, Tracer Ln, Copeland St, Brewster Rd, Hibiscus Ave, Miriam Rd, Greer St, Addison Rd, Juniper Hill Rd, Marlborough Rd and Shirley Rd).