National Academy of Fire and Safety Engineering

Yes, you can pursue PGDM in fire safety and hazard management after completing your B.Sc in zoology. Admission requirements and eligibility criteria may vary from institution to institution, so it's best to check with the specific program and institution you are interested in.
Typically, PGDM programs in fire safety and hazard management require candidates to hold a bachelor's degree in any discipline from a recognized university with a minimum percentage of marks. Some institutions may also require candidates to have work experience in the related field.
While a background in zoology may not be directly related to fire safety and hazard management, it can still be useful in this field. For example, knowledge of animal behavior and ecosystems can be helpful in understanding how fires can impact wildlife and their habitats.
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Yes, I think you can do it through distance education.
The NFA shares its 107-acre (0.43km2) Emmetsburg campus with the Emergency Management Institute (EMI) operated by the Directorate of Preparedness branch of FEMA. The campus also includes the Learning Resource Center (LRC) library, the National Fire Data Center, and the National Fallen Firefighters Memorial.
The campus was the original site of Saint Josephs Academy, a Catholic school for girls from 1809 until 1973. It was purchased by the U.S. Government in 1979 for use as the NETC.
In 2008, the National Fire Academy trained over 122,000first responders from all 50 U.S. states.
The campus library at the National Fire Academy collects resources on fire, emergency management and other all-hazards subjects. With its collection of more than 208,000 books, reports, periodicals, and audiovisual materials, the NETC Library facilitates and supports student and faculty research and supplements classroom lectures and course materials. Internet users may access the library's online catalog to perform their own literature searches.[15]The NETC Library catalog is a unique guide to periodical literature with citations on fire, EMS, emergency management, natural disasters, and homeland security topics going back to the early 1970s. Librarians on staff index nearly 5,000 newly published articles each year, from scores of professional journals, magazines and newsletters across the country and internationally.

You have not mentioned about the course you wish to pursue. However following is the admission procedure.
1. Download Application Form & Fill the Correct Detail
2. Demand Draft drawn in favor of National Academy of Fire & Safety Engineering, payable at Nagpur (Maharashtra) or Submitted to Cash into NAFS Account towards the prescribed admission fees.
3. Mail us to Your Application Scan Copy with required documents and DD/Payment Slip on- information@nafsindia. Com for your registration.
4. Send Hard Copy with Required Documents by Courier to Following Address : -
NAFS HOUSE
P. N. 101, Near Sakkardara Flyover, Reshimbagh Layout, Reshimbagh, Nagpur- 440024 (MH)
If Any Query, Call to Student Helpline Numbers- +91 9420-680-101/ +91 9420-780-101.