Air carrier flight attendant reported a burning odor coming from the aft lavatories. No fire was det...

Narrative:

About an hour into cruise the flight crew noticed a strong chemical; electric; metallic; burning odor coming from both aft lavatories. After briefing as a crew and calling the FD; we searched trash cans; and felt for fire all over the lavatories. After realizing there was no obvious fire; we had the FD pull the circuits of the aft lav water heaters. We waited 20 more minutes and re checked; but the smell became worse. We locked both aft lavatories and completed a beverage service; while checking the lavatories as much as possible throughout; as requested by FD. B flight attendant was in and out at least 10 times; and C probably 8 times. D and a 5 times or less. When we realized our minds were becoming affected; and when our throats burned; eyes watered; and head hurt; we all decided to emergency land in ZZZ. Upon cabin prep; my mind was very dull; overcome by fumes. I felt very intoxicated and confused. Registered 4.5% co almost 5 hours after breathing 20% O2 as administered by emt crew and at hospital. Still feel dull 4 days later.monitor air quality in flight. Do not let cabin crew breathe toxic fumes. After accidents; assign helper to affected crew. Do not bombard crew with instructions after air quality incident. Give them time of 3-5 days to recover brain function.

Original NASA ASRS Text

Title: Air carrier Flight Attendant reported a burning odor coming from the aft lavatories. No fire was detected but the Flight Attendant reported feeling ill shortly after. The flight then diverted to the nearest suitable airport.

Narrative: About an hour into cruise the flight crew noticed a strong chemical; electric; metallic; burning odor coming from both aft lavatories. After briefing as a crew and calling the FD; we searched trash cans; and felt for fire all over the lavatories. After realizing there was no obvious fire; we had the FD pull the circuits of the aft lav water heaters. We waited 20 more minutes and re checked; but the smell became worse. We locked both aft lavatories and completed a beverage service; while checking the lavatories as much as possible throughout; as requested by FD. B FA was in and out at least 10 times; and C probably 8 times. D and A 5 times or less. When we realized our minds were becoming affected; and when our throats burned; eyes watered; and head hurt; we all decided to emergency land in ZZZ. Upon cabin prep; my mind was very dull; overcome by fumes. I felt VERY intoxicated and confused. Registered 4.5% CO almost 5 hours after breathing 20% O2 as administered by EMT crew and at hospital. Still feel dull 4 days later.Monitor air quality in flight. Do not let cabin crew breathe toxic fumes. After accidents; assign helper to affected crew. Do not bombard crew with instructions after air quality incident. Give them time of 3-5 days to recover brain function.

Data retrieved from NASA's ASRS site and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.

Attributes
ACN	1453261
Time
Date	201705
Local Time Of Day	0001-0600
Place
Locale Reference	ZZZ.Airport
State Reference	US
Aircraft 1
Make Model Name	Commercial Fixed Wing
Operating Under FAR Part	Part 121
Flight Phase	Cruise
Flight Plan	IFR
Person 1
Function	Flight Attendant (On Duty)
Qualification	Flight Attendant Current
Events
Anomaly	Aircraft Equipment Problem Less Severe Deviation - Procedural Published Material / Policy Flight Deck / Cabin / Aircraft Event Illness Flight Deck / Cabin / Aircraft Event Smoke / Fire / Fumes / Odor Inflight Event / Encounter Other / Unknown

Air carrier flight attendant reported a burning odor coming from the aft lavatories. No fire was detected but the flight attendant reported feeling ill shortly after. The flight then diverted to the nearest suitable airport.