B737-800
Physiological - Other
Aircraft Equipment Problem Less Severe; Deviation / Discrepancy - Procedural Published Material / Policy; Flight Deck / Cabin / Aircraft Event Illness / Injury; Flight Deck / Cabin / Aircraft Event Smoke / Fire / Fumes / Odor
General Maintenance Action; General Flight Cancelled / Delayed
Aircraft
On ground in ZZZZ we were using ground AC and saw a little bit of haze in the cabin and it smelled a little sulfur like. My throat is a little sore from the air. My head feels a little foggy and I have a slight headache. We got off the plane with all the passengers. We need to have aircraft with a working APU when we fly somewhere hot. It's a safety issue to have a working APU in hot locals. Especially when we all have to wear a mask. It makes you even hotter.Don't send a plane that doesn't have a working APU to a hot location. Maybe airports should make sure their ground ac units are clean and not burning off anything. Maybe they need to be run regularly whether they get used or not.
B737-800 Flight Attendant reported a fumes event during preflight while using ground AC. Passengers and flight crew deplaned.