Houston Fire Chief Sam Peña on Tuesday warned of dire consequences — including possible layoffs of more than 800 firefighters and deferred maintenance or upgrades on aging equipment, if voters approve the firefighters’ pay parity initiative on the November ballot. Peña’s warning came during a City Council Committee on Budget & Fiscal Affairs meeting to provide city leaders with their first look at how the Houston Fire Department might handle the costs of the ballot measure, which proposes to raise firefighter pay to that of their police peers. In its latest estimate, the Turner administration says approval of the referendum would cost the city $98 million in its first year and would lead to cuts at the fire department as well as in other city agencies.