Arsenal went forward by a 57th-minute Kim Little penalty however Kerr headed an 89th-minute equaliser to make sure Chelsea keep three factors away from the Gunners on the high.
The gang of 46,811 was the second largest in WSL historical past.
There have been worrying scenes of crowding exterior Emirates Stadium and lots of supporters solely reached their seats after kick-off following large queues.
Arsenal stated in an announcement: “Our matchday operation was the same as every other fixture and event at Emirates Stadium.
“An early kick-off combined with a number of new supporters to our stadium, coupled with 50 per cent of supporters arriving in the last 20 minutes before kick-off resulted in busy turnstile areas.
“We will continue to educate supporters on arriving early to the stadium for necessary security and bag checks and continue to discourage supporters bringing any necessary luggage and large bags.”