diff --git a/doc/api/fs.md b/doc/api/fs.md
index 8bc585d3a729..15f3167c7d55 100644
--- a/doc/api/fs.md
+++ b/doc/api/fs.md
@@ -574,6 +574,9 @@ changes:
     description: The `path` parameter can be a WHATWG `URL` object using `file:`
                  protocol. Support is currently still *experimental*.
 -->
+Note that this is a blocking call. Avoid this method in an asynchronous
+environment. See [Overview of Blocking vs Non-Blocking][]
+for more information.
 
 * `path` {string|Buffer|URL}
 * `mode` {integer} **Default:** `fs.constants.F_OK`
@@ -640,6 +643,9 @@ changes:
     pr-url: https://github.com/nodejs/node/pull/3163
     description: The `file` parameter can be a file descriptor now.
 -->
+Note that this is a blocking call. Avoid this method in an asynchronous
+environment. See [Overview of Blocking vs Non-Blocking][]
+for more information.
 
 * `file` {string|Buffer|number} filename or file descriptor
 * `data` {string|Buffer}
@@ -719,6 +725,9 @@ changes:
     description: The `path` parameter can be a WHATWG `URL` object using `file:`
                  protocol. Support is currently still *experimental*.
 -->
+Note that this is a blocking call. Avoid this method in an asynchronous
+environment. See [Overview of Blocking vs Non-Blocking][]
+for more information.
 
 * `path` {string|Buffer|URL}
 * `uid` {integer}
@@ -747,6 +756,9 @@ to the completion callback.
 <!-- YAML
 added: v0.1.21
 -->
+Note that this is a blocking call. Avoid this method in an asynchronous
+environment. See [Overview of Blocking vs Non-Blocking][]
+for more information.
 
 * `fd` {integer}
 
@@ -805,6 +817,9 @@ fs.copyFile('source.txt', 'destination.txt', COPYFILE_EXCL, callback);
 <!-- YAML
 added: v8.5.0
 -->
+Note that this is a blocking call. Avoid this method in an asynchronous
+environment. See [Overview of Blocking vs Non-Blocking][]
+for more information.
 
 * `src` {string|Buffer|URL} source filename to copy
 * `dest` {string|Buffer|URL} destination filename of the copy operation
@@ -1128,6 +1143,9 @@ are given to the completion callback.
 <!-- YAML
 added: v0.4.7
 -->
+Note that this is a blocking call. Avoid this method in an asynchronous
+environment. See [Overview of Blocking vs Non-Blocking][]
+for more information.
 
 * `fd` {integer}
 * `mode` {integer}
@@ -1157,6 +1175,9 @@ to the completion callback.
 <!-- YAML
 added: v0.4.7
 -->
+Note that this is a blocking call. Avoid this method in an asynchronous
+environment. See [Overview of Blocking vs Non-Blocking][]
+for more information.
 
 * `fd` {integer}
 * `uid` {integer}
@@ -1185,6 +1206,9 @@ given to the completion callback.
 <!-- YAML
 added: v0.1.96
 -->
+Note that this is a blocking call. Avoid this method in an asynchronous
+environment. See [Overview of Blocking vs Non-Blocking][]
+for more information.
 
 * `fd` {integer}
 
@@ -1213,6 +1237,9 @@ except that the file to be stat-ed is specified by the file descriptor `fd`.
 <!-- YAML
 added: v0.1.95
 -->
+Note that this is a blocking call. Avoid this method in an asynchronous
+environment. See [Overview of Blocking vs Non-Blocking][]
+for more information.
 
 * `fd` {integer}
 
@@ -1239,6 +1266,9 @@ to the completion callback.
 <!-- YAML
 added: v0.1.96
 -->
+Note that this is a blocking call. Avoid this method in an asynchronous
+environment. See [Overview of Blocking vs Non-Blocking][]
+for more information.
 
 * `fd` {integer}
 
@@ -1307,6 +1337,9 @@ The last three bytes are null bytes ('\0'), to compensate the over-truncation.
 <!-- YAML
 added: v0.8.6
 -->
+Note that this is a blocking call. Avoid this method in an asynchronous
+environment. See [Overview of Blocking vs Non-Blocking][]
+for more information.
 
 * `fd` {integer}
 * `len` {integer} **Default:** `0`
@@ -1348,6 +1381,9 @@ changes:
     description: Numeric strings, `NaN` and `Infinity` are now allowed
                  time specifiers.
 -->
+Note that this is a blocking call. Avoid this method in an asynchronous
+environment. See [Overview of Blocking vs Non-Blocking][]
+for more information.
 
 * `fd` {integer}
 * `atime` {integer}
@@ -1379,6 +1415,9 @@ Only available on macOS.
 <!-- YAML
 deprecated: v0.4.7
 -->
+Note that this is a blocking call. Avoid this method in an asynchronous
+environment. See [Overview of Blocking vs Non-Blocking][]
+for more information.
 
 * `path` {string|Buffer}
 * `mode` {integer}
@@ -1448,6 +1487,9 @@ changes:
                  `URL` objects using `file:` protocol. Support is currently
                  still *experimental*.
 -->
+Note that this is a blocking call. Avoid this method in an asynchronous
+environment. See [Overview of Blocking vs Non-Blocking][]
+for more information.
 
 * `existingPath` {string|Buffer|URL}
 * `newPath` {string|Buffer|URL}
@@ -1487,6 +1529,9 @@ changes:
     description: The `path` parameter can be a WHATWG `URL` object using `file:`
                  protocol. Support is currently still *experimental*.
 -->
+Note that this is a blocking call. Avoid this method in an asynchronous
+environment. See [Overview of Blocking vs Non-Blocking][]
+for more information.
 
 * `path` {string|Buffer|URL}
 
@@ -1523,6 +1568,9 @@ changes:
     description: The `path` parameter can be a WHATWG `URL` object using `file:`
                  protocol. Support is currently still *experimental*.
 -->
+Note that this is a blocking call. Avoid this method in an asynchronous
+environment. See [Overview of Blocking vs Non-Blocking][]
+for more information.
 
 * `path` {string|Buffer|URL}
 * `mode` {integer} **Default:** `0o777`
@@ -1605,6 +1653,9 @@ fs.mkdtemp(`${tmpDir}${sep}`, (err, folder) => {
 <!-- YAML
 added: v5.10.0
 -->
+Note that this is a blocking call. Avoid this method in an asynchronous
+environment. See [Overview of Blocking vs Non-Blocking][]
+for more information.
 
 * `prefix` {string}
 * `options` {string|Object}
@@ -1724,6 +1775,9 @@ changes:
     description: The `path` parameter can be a WHATWG `URL` object using `file:`
                  protocol. Support is currently still *experimental*.
 -->
+Note that this is a blocking call. Avoid this method in an asynchronous
+environment. See [Overview of Blocking vs Non-Blocking][]
+for more information.
 
 * `path` {string|Buffer|URL}
 * `flags` {string|number}
@@ -1814,6 +1868,9 @@ changes:
     description: The `path` parameter can be a WHATWG `URL` object using `file:`
                  protocol. Support is currently still *experimental*.
 -->
+Note that this is a blocking call. Avoid this method in an asynchronous
+environment. See [Overview of Blocking vs Non-Blocking][]
+for more information.
 
 * `path` {string|Buffer|URL}
 * `options` {string|Object}
@@ -1914,6 +1971,9 @@ changes:
     pr-url: https://github.com/nodejs/node/pull/3163
     description: The `path` parameter can be a file descriptor now.
 -->
+Note that this is a blocking call. Avoid this method in an asynchronous
+environment. See [Overview of Blocking vs Non-Blocking][]
+for more information.
 
 * `path` {string|Buffer|URL|integer} filename or file descriptor
 * `options` {Object|string}
@@ -1975,6 +2035,9 @@ changes:
     description: The `path` parameter can be a WHATWG `URL` object using `file:`
                  protocol. Support is currently still *experimental*.
 -->
+Note that this is a blocking call. Avoid this method in an asynchronous
+environment. See [Overview of Blocking vs Non-Blocking][]
+for more information.
 
 * `path` {string|Buffer|URL}
 * `options` {string|Object}
@@ -1995,6 +2058,9 @@ changes:
     pr-url: https://github.com/nodejs/node/pull/4518
     description: The `length` parameter can now be `0`.
 -->
+Note that this is a blocking call. Avoid this method in an asynchronous
+environment. See [Overview of Blocking vs Non-Blocking][]
+for more information.
 
 * `fd` {integer}
 * `buffer` {string|Buffer|Uint8Array}
@@ -2107,6 +2173,9 @@ changes:
     pr-url: https://github.com/nodejs/node/pull/3594
     description: The `cache` parameter was removed.
 -->
+Note that this is a blocking call. Avoid this method in an asynchronous
+environment. See [Overview of Blocking vs Non-Blocking][]
+for more information.
 
 * `path` {string|Buffer|URL}
 * `options` {string|Object}
@@ -2188,6 +2257,9 @@ changes:
                  objects using `file:` protocol. Support is currently still
                  *experimental*.
 -->
+Note that this is a blocking call. Avoid this method in an asynchronous
+environment. See [Overview of Blocking vs Non-Blocking][]
+for more information.
 
 * `oldPath` {string|Buffer|URL}
 * `newPath` {string|Buffer|URL}
@@ -2227,6 +2299,9 @@ changes:
     description: The `path` parameters can be a WHATWG `URL` object using
                  `file:` protocol. Support is currently still *experimental*.
 -->
+Note that this is a blocking call. Avoid this method in an asynchronous
+environment. See [Overview of Blocking vs Non-Blocking][]
+for more information.
 
 * `path` {string|Buffer|URL}
 
@@ -2276,6 +2351,9 @@ changes:
     description: The `path` parameter can be a WHATWG `URL` object using `file:`
                  protocol. Support is currently still *experimental*.
 -->
+Note that this is a blocking call. Avoid this method in an asynchronous
+environment. See [Overview of Blocking vs Non-Blocking][]
+for more information.
 
 * `path` {string|Buffer|URL}
 
@@ -2323,6 +2401,9 @@ changes:
                  using `file:` protocol. Support is currently still
                  *experimental*.
 -->
+Note that this is a blocking call. Avoid this method in an asynchronous
+environment. See [Overview of Blocking vs Non-Blocking][]
+for more information.
 
 * `target` {string|Buffer|URL}
 * `path` {string|Buffer|URL}
@@ -2356,6 +2437,9 @@ being thrown in the future.
 <!-- YAML
 added: v0.8.6
 -->
+Note that this is a blocking call. Avoid this method in an asynchronous
+environment. See [Overview of Blocking vs Non-Blocking][]
+for more information.
 
 * `path` {string|Buffer}
 * `len` {integer} **Default:** `0`
@@ -2396,6 +2480,9 @@ changes:
     description: The `path` parameter can be a WHATWG `URL` object using `file:`
                  protocol. Support is currently still *experimental*.
 -->
+Note that this is a blocking call. Avoid this method in an asynchronous
+environment. See [Overview of Blocking vs Non-Blocking][]
+for more information.
 
 * `path` {string|Buffer|URL}
 
@@ -2475,6 +2562,9 @@ changes:
     description: Numeric strings, `NaN` and `Infinity` are now allowed
                  time specifiers.
 -->
+Note that this is a blocking call. Avoid this method in an asynchronous
+environment. See [Overview of Blocking vs Non-Blocking][]
+for more information.
 
 * `path` {string|Buffer|URL}
 * `atime` {integer}
@@ -2820,6 +2910,9 @@ changes:
     pr-url: https://github.com/nodejs/node/pull/3163
     description: The `file` parameter can be a file descriptor now.
 -->
+Note that this is a blocking call. Avoid this method in an asynchronous
+environment. See [Overview of Blocking vs Non-Blocking][]
+for more information.
 
 * `file` {string|Buffer|integer} filename or file descriptor
 * `data` {string|Buffer|Uint8Array}
@@ -2841,6 +2934,9 @@ changes:
     pr-url: https://github.com/nodejs/node/pull/7856
     description: The `offset` and `length` parameters are optional now.
 -->
+Note that this is a blocking call. Avoid this method in an asynchronous
+environment. See [Overview of Blocking vs Non-Blocking][]
+for more information.
 
 * `fd` {integer}
 * `buffer` {Buffer|Uint8Array}
@@ -2856,6 +2952,9 @@ changes:
     pr-url: https://github.com/nodejs/node/pull/7856
     description: The `position` parameter is optional now.
 -->
+Note that this is a blocking call. Avoid this method in an asynchronous
+environment. See [Overview of Blocking vs Non-Blocking][]
+for more information.
 
 * `fd` {integer}
 * `string` {string}
@@ -3137,3 +3236,4 @@ The following constants are meant for use with the [`fs.Stats`][] object's
 [inode]: https://en.wikipedia.org/wiki/Inode
 [Naming Files, Paths, and Namespaces]: https://msdn.microsoft.com/en-us/library/windows/desktop/aa365247(v=vs.85).aspx
 [MSDN-Using-Streams]: https://msdn.microsoft.com/en-us/library/windows/desktop/bb540537.aspx
+[Overview of Blocking vs Non-Blocking]: https://nodejs.org/en/docs/guides/blocking-vs-non-blocking/