The number of fire stations in North Yorkshire, West Yorkshire, South Yorkshire and Humberside, the four fire and rescue services that make up the Yorkshire and the Humber region, was a) 138 in 2010 b) 126 in 2019 (the latest year for which published statistics are available)
Further detail is available in table FIRE1403 here https://www.gov.uk/government/statistical-data-sets/fire-statistics-datatables#other
Operational matters (including where to locate fire stations) and the response to them are for each individual fire and rescue service (FRS) to determine, along with their associated Fire and Rescue Authority (FRA). Every fire and rescue service is obliged to carry out its own risk assessments and identify appropriate control measures to protect its staff and communities. The Integrated Risk Management Plan for each FRS is published by the FRA. The National Fire Chiefs Council, through their Central Programme Office, provide operational guidance spanning a wide range of activity to assist fire and rescue services in their work.