Electrical safety
Microwaved water can be superheated
Avoid overheating water and allow the instructed standing time before handling. Keep your face away and do not abruptly add a spoon or powder to very hot water.
Last reviewed: 2026-09-20
Why it matters
Microwaved water may become hotter than its boiling point without bubbles and erupt when disturbed.
Wrong action
Overheating still-looking water then immediately dropping a spoon into it.
Correct action
Avoid overheating water and allow the instructed standing time before handling.
What to do
- Use a suitable container and the heating time in the appliance instructions.
- Avoid overheating water and allow the instructed standing time before handling.
- Keep your face away and do not abruptly add a spoon or powder to very hot water.
If something happens
For serious injury, unconsciousness or difficulty breathing, keep yourself safe, call 999 and follow the operator.
Sources and review
- Hong Kong Consumer Council — Consumer Council: microwave superheating and stored high voltage
Last reviewed: 2026-09-20
This page provides general home-safety information and does not replace medical, legal, electrical, or other professional advice.