PricewaterhouseCoopers LLP
125 High Street
Boston, MA 02110-1707
Telephone (617) 530 5000
Facsimile (617) 530 5001


Report of Independent Registered Public Accounting Firm

To the Trustees of DWS Securities Trust and Shareholders
of DWS Health Care Fund:

In planning and performing our audit of the financial
statements of DWS Health Care Fund (the "Fund"),
as of and for the year ended May 31, 2009, in accordance
with the standards of the Public Company
Accounting Oversight Board (United States), we
considered the Fund's internal control over financial
reporting, including control activities for safeguarding
securities, as a basis for designing our auditing
procedures for the purpose of expressing our opinion on
the financial statements and to comply with the
requirements of Form N-SAR, but not for the purpose of
expressing an opinion on the effectiveness of the
Fund's internal control over financial reporting.
Accordingly, we do not express an opinion on the
effectiveness of the Fund's internal control over financial
reporting.

The management of the Fund is responsible for
establishing and maintaining effective internal control over
financial reporting.  In fulfilling this responsibility,
estimates and judgments by management are required to
assess the expected benefits and related costs of controls.
A fund's internal control over financial
reporting is a process designed to provide reasonable
assurance regarding the reliability of financial
reporting and the preparation of financial statements for
external purposes in accordance with generally
accepted accounting principles.  A fund's internal control
over financial reporting includes those policies
and procedures that (1) pertain to the maintenance of
records that, in reasonable detail, accurately and
fairly reflect the transactions and dispositions of the assets
of the fund; (2) provide reasonable assurance
that transactions are recorded as necessary to permit
preparation of financial statements in accordance
with generally accepted accounting principles, and that
receipts and expenditures of the fund are being
made only in accordance with authorizations of
management and trustees of the fund; and (3)  provide
reasonable assurance regarding prevention or timely
detection of unauthorized acquisition, use or
disposition of a fund's assets that could have a material
effect on the financial statements.

Because of its inherent limitations, internal control over
financial reporting may not prevent or detect
misstatements. Also, projections of any evaluation of
effectiveness to future periods are subject to the risk
that controls may become inadequate because of changes
in conditions, or that the degree of compliance
with the policies or procedures may deteriorate.

A deficiency in internal control over financial reporting
exists when the design or operation of a control
does not allow management or employees, in the normal
course of performing their assigned functions, to
prevent or detect misstatements on a timely basis.  A
material weakness is a deficiency, or a combination
of deficiencies, in internal control over financial reporting,
such that there is a reasonable possibility that a
material misstatement of the Fund's annual or interim
financial statements will not be prevented or
detected on a timely basis.

Our consideration of the Fund's internal control over
financial reporting was for the limited purpose
described in the first paragraph and would not necessarily
disclose all deficiencies in internal control over
financial reporting that might be material weaknesses
under standards established by the Public Company
Accounting Oversight Board (United States).  However,
we noted no deficiencies in the Fund's internal
control over financial reporting and its operation,
including controls for safeguarding securities, that we
consider to be material weaknesses as defined above as of
May 31, 2009.

This report is intended solely for the information and use
of the Trustees, management, and the Securities
and Exchange Commission and is not intended to be and
should not be used by anyone other than these
specified parties.


PricewaterhouseCoopers LLP
July 20, 2009

PricewaterhouseCoopers LLP
125 High Street
Boston, MA 02110-1707
Telephone (617) 530 5000
Facsimile (617) 530 5001


Report of Independent Registered Public Accounting Firm

To the Trustees of DWS Securities Trust and Shareholders
of DWS Climate Change Fund:

In planning and performing our audit of the financial
statements of DWS Climate Change Fund (the
"Fund"), as of and for the year ended May 31, 2009, in
accordance with the standards of the Public
Company Accounting Oversight Board (United States), we
considered the Fund's internal control over
financial reporting, including control activities for
safeguarding securities, as a basis for designing our
auditing procedures for the purpose of expressing our
opinion on the financial statements and to comply
with the requirements of Form N-SAR, but not for the
purpose of expressing an opinion on the
effectiveness of the Fund's internal control over financial
reporting.  Accordingly, we do not express an
opinion on the effectiveness of the Fund's internal control
over financial reporting.

The management of the Fund is responsible for
establishing and maintaining effective internal control over
financial reporting.  In fulfilling this responsibility,
estimates and judgments by management are required to
assess the expected benefits and related costs of controls.
A fund's internal control over financial
reporting is a process designed to provide reasonable
assurance regarding the reliability of financial
reporting and the preparation of financial statements for
external purposes in accordance with generally
accepted accounting principles.  A fund's internal control
over financial reporting includes those policies
and procedures that (1) pertain to the maintenance of
records that, in reasonable detail, accurately and
fairly reflect the transactions and dispositions of the assets
of the fund; (2) provide reasonable assurance
that transactions are recorded as necessary to permit
preparation of financial statements in accordance
with generally accepted accounting principles, and that
receipts and expenditures of the fund are being
made only in accordance with authorizations of
management and trustees of the fund; and (3)  provide
reasonable assurance regarding prevention or timely
detection of unauthorized acquisition, use or
disposition of a fund's assets that could have a material
effect on the financial statements.

Because of its inherent limitations, internal control over
financial reporting may not prevent or detect
misstatements. Also, projections of any evaluation of
effectiveness to future periods are subject to the risk
that controls may become inadequate because of changes
in conditions, or that the degree of compliance
with the policies or procedures may deteriorate.

A deficiency in internal control over financial reporting
exists when the design or operation of a control
does not allow management or employees, in the normal
course of performing their assigned functions, to
prevent or detect misstatements on a timely basis.  A
material weakness is a deficiency, or a combination
of deficiencies, in internal control over financial reporting,
such that there is a reasonable possibility that a
material misstatement of the Fund's annual or interim
financial statements will not be prevented or
detected on a timely basis.

Our consideration of the Fund's internal control over
financial reporting was for the limited purpose
described in the first paragraph and would not necessarily
disclose all deficiencies in internal control over
financial reporting that might be material weaknesses
under standards established by the Public Company
Accounting Oversight Board (United States).  However,
we noted no deficiencies in the Fund's internal
control over financial reporting and its operation,
including controls for safeguarding securities, that we
consider to be material weaknesses as defined above as of
May 31, 2009.

This report is intended solely for the information and use
of the Trustees, management, and the Securities
and Exchange Commission and is not intended to be and
should not be used by anyone other than these
specified parties.


PricewaterhouseCoopers LLP
July 20, 2009