Water has a specific heat capacity of about 4.2 Kilojoules per kilogram per degree Kelvin, so it would take about 6 Kilowatt Hours of electricity to heat 100 Litres of water from 15 degrees centigrade to 65 degrees centigrade. As a standard immersion heater is 3KW, so it would take 2 hours to heat 100 Litres of water.
A large number of medications may cause hiccups. Medications taken only at bedtime, such as sleep medicine, cause hiccups primarily during sleep. Other medications cause hiccups at other times of the day as well. These are examples of medications that may produce hiccups: Sleep medications: eszopiclone (Lunesta)
They are caused by sudden contractions of the diaphragm triggered by irritation or stimulation of that muscle. Some leading pediatricians are of the opinion that infant hiccups are usually caused by feeding (breast, formula or other foods) or by a drop in temperature that causes the baby to get cold. Hiccups are considered harmless unless they prove persistent enough to interfere with regular feeding and sleeping.