Maskill, 19, set a brand new world document of 1 minute and three seconds to assert the ladies’s 100m butterfly S14 title.
Kearney then took the S5 200m freestyle crown in 2:46.50, upgrading the silver she received at Tokyo 2020.
The victory secured a second profession Paralympic gold for the 27-year-old, who’s reigning S5 100m freestyle champion.
Maskill’s success at La Protection Area adopted silver for fellow British teenager William Ellard within the males’s equal occasion.
Ellard, 18, touched the road in 54.86 seconds and was pipped to gold by Danish athlete Alexander Hillhouse.
Requested how she was feeling, Maskill mentioned: “Unreal. Bizarre. I used to be simply hoping that I swam as laborious as I may, and see what occurs.
“It feels so bizarre to be the primary gold medallist for ParalympicsGB.”
Olivia Newman-Baronius – the earlier joint world document holder – completed fourth, behind team-mate Maskill, China’s Yui Lam Chan and Russian Valeriia Shabalina.
Kearney held off the problem of Ukraine’s Iryna Poida and Italian Monica Boggioni to win the ultimate race of the opening day of the Video games.
Having suffered a head harm final 12 months, she was nonetheless uncertain if she would compete in France as just lately as a fortnight in the past.
“I actually needed redemption for Tokyo,” mentioned Kearney, who was born with cerebral palsy and developed generalised dystonia – a neurological motion dysfunction characterised by steady or intermittent muscle contractions – as an adolescent.
“I used to be by no means proud of that silver, so to go and get gold within the 200m freestyle was simply unbelievable.
“It’s been actually laborious with the concussion after which the final three, 4 months, actually laborious with psychological well being points.
“Even just a few weeks in the past, we weren’t certain whether or not I used to be going to return out and compete or what number of occasions I’d be capable to do.
“I’m simply completely ecstatic. A bit speechless.”