Immediately evacuate your home. If anyone in the household is experiencing symptoms of carbon monoxide poisoning, call 911 from a cell phone or neighbor's home. If no one is experiencing symptoms, call the local fire department or a qualified technician so your home can be inspected. If you’re not able to evacuate your home, open as many windows and doors as possible and call for help. You should also turn off any possible sources of carbon monoxide if you can.