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Home Heating Emergency Assistance Through Transportation Act of 2014 or HHEATT Act of 2014 - Declares that a covered emergency exemption from federal motor carrier safety regulations issued by the Federal Motor Carrier Safety Administration (FMCSA) shall remain in effect until May 31, 2014, unless the Secretary of Transportation (DOT) determines that the emergency for which the exemption was provided ends before that date.

Defines "covered emergency exemption" as one issued or extended between February 5, 2014, and the date of enactment of this Act to effect regulatory relief for commercial motor vehicle operations directly assisting the delivery of propane and home heating fuels.

States that nothing in this Act may be construed to prohibit the FMCSA from issuing or extending a covered emergency exemption beyond May 31, 2014, under other federal law.