SUITLAND, Md. (WUSA9) -- First responders in Prince George's County had to use sleds and National Guard humvees to rescue people with medical emergencies.

Most calls for help involve attempting to drive on side streets that are either unplowed or have only one lane available.

On Shadyside Avenue in Suitland, neighbors rushed to help EMT/Firefighters push aside vehicles that were blocking the path of an ambulance rushing to get to a man who had trouble breathing.

The struggle resulted in a 20 minute response time for a call that usually takes five minutes, the patient's wife said.

Two National Guard Humvees have been assigned to the Suitland area to help navigate unplowed streets.  Firefighters are also using four-wheel-drive pickups mounted with plows to retrieve patients and bring them out to wait for ambulances.

NEW YORK (AP) - The death of a woman who had silicone injected into her buttocks in New York City has been ruled a homicide.

A spokeswoman for the medical examiner's office says Kelly Mayhew died after the silicone entered her bloodstream.

Police said the Suitland, Maryland, woman was found unresponsive at a Queens apartment on May 30. Her mother performed CPR and called 911, but Mayhew didn't survive.

Authorities are still looking for the woman suspected of giving Mayhew the injections.

More than a dozen people in the United States have died from illicit injections. A Philadelphia woman was convicted in March of third-degree murder in the 2011 death of a dancer from London who died after low-grade silicone traveled to her lungs.

SUITLAND, Md. (WUSA9) -- A group of Prince George's County police officers and firefighters acted quickly Friday morning to save a man from a burning car in a dramatic rescue caught on video.

According to county police, a person called in a report of a burning car at around 12:30 a.m. in the 2700 block of Lakewood Street in Suitland. When police officers arrived at the scene, they found the car fully engulfed in flames and the driver still inside.

Two officers tried to pull the man out of the car, but the flames were too intense to do so. Police say two more officers arrived on scene to help, armed with fire extinguishers.

"I jumped out, grabbed my fire extinguisher, ran to the burning car," Officer Nicholas Clayton with Prince George's County police said.