Preparing for Thailand's Rainy Season, Heavy Rains, and Floods: Drinking Water Reserves and Daily Life Measures Guide [For Residents]

Living in Thailand, one season that always brings a sense of concern is the rainy season.
Especially in urban areas like Bangkok, short heavy downpours, flooded roads, and traffic jams are often topics of discussion.
Depending on the region, there may also be floods and temporary impacts on daily infrastructure, so being prepared in advance brings peace of mind for residents.
This time, we will explain in an easy-to-understand manner how to prepare for Thailand's rainy, heavy rain, and flood season with drinking water stockpiling and daily life measures.

When is Thailand's rainy season? What are the impacts?
Thailand's rainy season varies by region, but it generally runs from around May to October.
During this period,
- Heavy rain falls for short periods
- Roads become flooded
- Traffic jams are prolonged
- Delivery delays occur
- Power outages and water supply disruptions may also be discussed
and other impacts on daily life can occur.
Especially for those living in Thailand for the first time, the impact on daily routines can be greater than expected.

Drinking water is the first thing to prepare for during the rainy season and floods.
On heavy rain days or days when movement is difficult, it may not be possible to go shopping.
Therefore, drinking water is the top priority for preparation.
Generally, some households prepare about 2-3 liters per person per day.
For example,
- 2L bottles: for home storage
- 500ml bottles: for carrying out/外出用
It is convenient to prepare according to usage.

Why is drinking water stock important during the rainy season?
During Thailand's rainy season, the following situations can occur:
- Delivery delays make it difficult to receive ordered items.
- It's difficult to go out.
- Convenience store products may temporarily decrease.
- It's difficult to go shopping during a power outage.
In other words, the problem is not that water is "not sold," but that it is difficult to get to or be delivered.
Therefore, rotating stock with a slightly larger quantity than usual is effective.

Heavy rain countermeasures to keep in mind for life in Bangkok
In Bangkok, road conditions can change rapidly due to short, heavy downpours.
Therefore,
- Check the weather forecast before returning home
- Carry drinking water when going out
- Prepare a mobile battery
- Stock up on a small amount of food and daily necessities
- Avoid unnecessary travel
such small daily preparations are useful.
Life Stock List Useful During Floods and Power Outages
In addition to drinking water, the following preparations are also recommended:
- Emergency food / room temperature storage food
- Mobile battery
- Flashlight
- Wet wipes
- Portable toilet supplies
- Regular medicines
- Small amount of cash
These are mainly items that are easy to prepare even when living in a condominium.

How to use your daily drinking water as an emergency supply
It's also practical to keep a slightly larger amount of the water you drink daily, rather than having separate emergency water.
By refilling only what you use, it becomes easier to prevent expiration.
Even in daily life in Thailand,
- I want to be particular about my daily drinking water
- I want to choose Japanese quality water
- I want a sense of security in emergencies
ONSENSUI99 is chosen by such people.
It is natural alkaline ionized water collected from deep underground in Tarumizu, Kagoshima Prefecture.
It is ultra-soft water with a hardness of 1.7, characterized by its gentle and mellow taste.
It is an easy choice for both daily use and emergency stocking.

Measures for when you encounter the rainy season during your trip to Thailand
Travelers visiting Thailand may also encounter the rainy season.
In that case,
- Carry drinking water
- An umbrella for sudden rain
- Allow extra time for travel
- Finish shopping around the hotel in advance
It's reassuring to keep these in mind.
Frequently Asked Questions (FAQ)
Does it rain all day, every day during Thailand's rainy season?
It depends on the region and time of year, but often it rains heavily for short periods rather than continuously all day.
Is it necessary to stock up on water during a flood?
It may become difficult to move around or go shopping, so having a supply of drinking water provides peace of mind.
Is it necessary to stock up even if you live in a condominium?
Even in urban areas, delivery delays and power outages can occur, so it's recommended to have at least basic preparations.
Related articles
▶ How to prepare for power outages and water outages in Thailand?
▶ Measures for PM2.5 in Thailand | Dry throat and hydration
▶ Is the water in Thailand safe? Explanation for Japanese people
▶ What is ONSENSUI99?
▶ Product page is here
Summary
During Thailand's rainy, heavy rain, and flood season, advance preparation can make a big difference in peace of mind.
Especially, by paying attention to:
- stockpiling drinking water
- mobile charging
- food reserves
- travel plans
- weather checks
you can reduce the impact on your daily life.
For those who want to use their daily drinking water as an emergency reserve, ONSENSUI99 is also an option.
Start making preparations now to enjoy a more comfortable life in Thailand.

