hinanzyo made tooi nara, hitori de muri ni arukukoto ha nai.

Here, まで means to / as far as, not until.

So 避難所まで means to the evacuation shelter or as far as the shelter.

With a word like 遠い (far), Nまで遠い means it is far to N.

• 学校まで遠い = It’s far to the school.
• 駅まで遠い = It’s far to the station.

So in this sentence, まで marks the endpoint of the distance.

Both can be used, but the nuance is a little different.

• 避難所が遠い focuses on the shelter being far away.
• 避難所まで遠い focuses on the distance to the shelter.

In other words, まで makes the path or destination more explicit: it’s far to get to the shelter.

For a learner, it may help to think of 避難所まで遠い as slightly closer to the shelter is a long way away from here.

なら is a conditional, often meaning if it is the case that... or if... then...

So:

• 遠いなら = if it’s far
• more literally: if it is true that it’s far

This form is often used when the speaker is reacting to information, a situation, or an assumption already on the table.

In this sentence, it sounds like:

• If the shelter is far, then...

Other conditionals are possible, but they feel slightly different:

• 遠ければ = a more general if it’s far
• 遠かったら = if it turns out to be far / if it is far
• 遠いなら = if, as you say / if in that case, it’s far

Here, なら fits well because the sentence gives advice based on that condition.

一人で means alone or by oneself.

The particle で here marks the manner or condition in which something is done.

So:

• 一人で行く = go alone
• 一人で食べる = eat alone
• 一人で歩く = walk alone

It is not the で of location here. It is closer to by / on one’s own / in the state of being alone.

無理 means something like:

• unreasonable
• impossible
• beyond one’s limits
• forcing it

When 無理 becomes 無理に, it functions adverbially, meaning:

• forcibly
• by pushing oneself too hard
• beyond what is reasonable

So 無理に歩く means:

• to force oneself to walk
• to walk even though it’s too much
• to push it and walk anyway

The に is what often turns a noun or na-adjective into an adverb-like form.

Compare:

• 静か → 静かに
• 丁寧 → 丁寧に
• 無理 → 無理に

The こと turns the verb into a noun-like expression.

• 歩く = to walk
• 歩くこと = walking / the act of walking

This happens because the sentence uses the grammar pattern:

• dictionary form + ことはない

So:

• 歩くことはない = there is no need to walk

You should learn 〜ことはない as a set expression meaning there’s no need to...

〜ことはない means:

• there is no need to...
• you don’t have to...

It is often used for advice, reassurance, or telling someone not to overdo something.

So 歩くことはない does not mean simply do not walk. It means more like:

• you don’t need to walk
• there’s no reason to force yourself to walk
• you don’t have to go that far

This is softer than a direct command.

For example:

• そんなに急ぐことはない。
  = There’s no need to hurry that much.

• 心配することはない。
  = There’s no need to worry.

The は is part of the common pattern 〜ことはない.

It gives a slight sense of contrast or emphasis, something like:

• as for walking, there is no need
• walking is not necessary

But in practice, you usually do not need to analyze it too literally here. It is best learned as a fixed grammar pattern:

• V-辞書形 + ことはない = there is no need to V

So just recognize 歩くことはない as one unit meaning there’s no need to walk.

They are very similar, and both can mean you don’t have to walk.

But there is a nuance difference:

• 歩かなくてもいい = more straightforwardly it’s okay not to walk
• 歩くことはない = there’s no need to walk, often sounding a bit more like advice or reassurance

So ことはない can feel slightly more like:

• don’t push yourself
• you really don’t need to do that

That nuance fits this sentence well because it includes 無理に.

Japanese often leaves the subject unstated when it is clear from context.

In this sentence, the person walking is understood from the situation, often:

• you
• the person being spoken to
• the relevant person in context

So even though Japanese does not explicitly say you, English usually needs to add it.

This omission is completely normal in Japanese and happens very often.

Japanese often leaves out information that is already easy to understand from context.

Since the sentence already mentions 避難所まで, it is clear that the walking is toward the shelter, so just 歩く is enough.

If someone said 歩いて行く, that would make the movement toward the destination more explicit, but it is not necessary here.

So 歩く here naturally means something like:

• walk there
• go on foot
• keep walking toward the shelter

The destination is already understood.