Does Hot Water Kill Roaches?

Many people believe that the harsh scent of chlorine is good for killing roaches.

However, this chemical smells good and seems like an ideal cleaner. The only problem is that it doesn’t appear to be very effective against many roaches.

So, does hot water kil roaches? Some people say that hot water can kill roaches.

However, this is false. A roach can survive in boiling water for several minutes.

So, if hot water can kill roaches, then boiling water should kill them instantly. However, this is not the case.

In fact, roaches are a hardy species that can swim in water and even survive nuclear explosions. So, hot water is definitely not the best way to kill roaches.

Does Hot Water Kill Roaches?

Cockroaches are killed by hot water that is over 132 degrees Fahrenheit.

The roaches will die faster if the temperature of the hot safran is upped so the water should be hotter than boiling to kill them quick.

As a result, boiling water kills cockroaches instantly, while moderately hot safran takes time for them to die off.

Does Hot Water Kill Cockroach Eggs?

Cockroach eggs may be killed by soaking them in very warm water for an hour or more but they will not hatch in hot water alone.

Because the temperature is not high enough for embryonic development to take place and the incubation process has to be complete before hatching can occur.

Hot water will also dissolve the protective shell and egg membranes, so there is a chance that the eggs will hatch incompletely.

So, while hot water may kill the developing roach eggs, it is unlikely to kill them all before they are hatched.

Because the eggs must have a certain temperature in order to hatch fully.

However, using the right materials can ensure that complete hatching takes place in hot water.

Roach eggs cannot survive temperatures above 118 degrees Fahrenheit or below -40 degrees Farenheit.

So, it is important to maintain the right temperature for the correct length of time to ensure that the eggs are killed completely before they hatch.

How Hot Water Kills Roaches?

A slight rise in temperature will cause the insect’s nervous system to shut down and die within minutes of contact.

Insects, especially roaches, are cold-blooded creatures; their body temperature is affected by their surroundings and the temperature in which they are kept.

As a result, a high temperature will kill the insect without harming any other surrounding objects or organisms like human beings or pets who are exposed to the same conditions as the insects that are being killed.

At high temperatures, the roach’s body’s enzymes stop functioning and the insects die within several hours from heat exhaustion due to dehydration and heat stroke.

When the temperature rises over the threshold level, the enzyme system in the insect ceases to function. This causes an increase in the insects’ metabolic rate and an increase in their body temperature to about 110 to 120 degrees Fahrenheit within a period of a few hours.

How to Kill Roaches Using Hot Water?

Identify Threats

Before utilizing hot water, you identify cockroach hideouts and cockroach harboring areas in your home. This helps you target roaches using hot water effectively.

Because roaches have a habit of hiding in dark, damp places such as under sinks and refrigerators, it is important to identify such areas.

Wear heat-resistant gloves and keep your hands away from your body when handling hot objects such as kettles.

Identify the Roach’s Nest

You must eliminate all sources of food and water for the cockroaches, otherwise they will return after you’ve eliminated them from your home.

Identifying cockroach nests enables you to locate and eliminate food sources for the cockroaches and other cockroaches that may survive your first attempt to eradicate them from your home.

Look for cockroach nests in areas such as crevices, cracks, wall cavities, and near the base of electrical appliances and furniture in your home.

Bring Water to a Boil

As previously said, the hotter the water the better it is for killing roaches.

As a result, before using it to kill roaches, you must bring the water to a full boil so that it becomes steaming hot; this kills more cockroaches than does cooler water.

Immediately Pour Hot Water on the Floor

To convey the most heat, pour boiling water directly onto the floor where you’ve seen a lot of roaches.

Do not spray hot water since it will evaporate before reaching its intended target and may expose you to the risk of burns.

You may need to repeat this step several times to completely eradicate all cockroaches that are present in the area.

Clean the Mess

It’s time to tidy and clean the area where you poured boiling water to eliminate dead cockroaches and other debris from their bodies that may be lying on the floor.

Because hot water will not kill eggs or baby roaches, continue cleaning until you’ve eradicated all the cockroaches from the infested area.

Can Cockroaches Breathe Under Water?

Cockroaches can breathe underwater for a short period only; they can breathe through small openings in their exoskeletons known as tracheae.

They would not be harmed if they got trapped in a pot of boiling water for a few minutes.

However, their internal systems would shut down and they would die within minutes if they stayed in the boiling pot for a longer period.

This is because they may die of shock due to the intense heat and because their nervous systems would fail to function normally.

Do Cockroaches Drown In Hot Water?

Cockroaches may drown and die from exposure to water; however, this is quite rare because their body structures can withstand extreme temperature differences.

However, in your absence, there is the possibility they could accidentally fall into a kettle of boiling water or get trapped there for several hours, and this could kill them.

However, death is imminent if water is poured directly on them or on them while they are trapped in a kettle of boiling water for several minutes.

Because the temperature level impacts the lifetime of the roaches in varying ways, it is important to find out how long they are able to survive in varying temperatures.

Does Boiling Water Kill Cockroaches?

Yes, cockroaches can die due to the effects of boiling hot water; this is because their respiratory systems are disrupted and they become dehydrated when exposed to high temperatures.

It not only kills adult cockroaches but also their eggs and babies, thus ensuring that they are completely eradicated from the infested area.

Roaches are loaded with moisture that help them survive in warm climates; this is because they can easily lose their water content and die if exposed to high temperatures.

Also Read: Does Peppermint Oil Repel Roaches?


In conclusion, hot water can kill cockroaches and can be used to get rid of cockroaches without insecticides.

However, it’s important to know that hot water alone will not be enough to completely get rid of cockroaches. It’s best to use hot water together with insecticide.