Nonstick surfaces found in cookware, space heaters, popcorn makers and various other appliances, emit toxic fumes when heated that can kill birds without warning.
Replace nonstick cookware with stainless-steel, cast iron, or ceramic cookware (PTFE/PFOA free).
Before you use a new appliance make sure you do a burn in (ideally this would be outside or in the garage far away from your birds).
If doing this inside, ensure your home is well-ventilated (e.g. open windows and screened doors) and temporarily locate your bird to an area of your home with a separate airspace.
A pot full of boiling water might look like a great bathing spot to your bird – very bad! And worse, the pot may be full of hot oil or sauce. Keep your bird away from the kitchen when you are cooking.