Over-the-air updates will tweak billing settings and thermal management of a Model S or X battery pack. As shown by Roadshow of CNET changes are likely to allow vehicles to manage the temperature and battery level of each battery better. Thus, it can help prevent the possibility of excessive waste that can start fires in lithium-ion battery packs.
A spokeswoman in a statement:
"Currently we have more than half a million vehicles on the road, more than double the number we have at the beginning of last year, and the team of battery experts by Tesla uses data to thoroughly investigate events that occur and understand the root cause. Even fire incidents involving Tesla vehicles are very rare and our cars are 10 times more it is likely to experience fire rather than a car, we believe the correct number of Incident incidents is zero. 
As we continue to investigate the root cause, with a caution, changing let's charge billing and thermal management settings on Model S and Model X vehicles through over-the-tide water software updates that will start out today, to help with more protection n the battery and improve the battery length. "
According to Reuters there were several dozens of Teslas reports that fires last six years, most of the crashes and other accidents. However, after the Shanghai incident , chief company Elon Musk took on Twitter to point out that combustion cars burst and kill people more often:
Reality is a Tesla, like most electric cars, is over at 500% * less * Likely to catch fire rather than burning machine cars, bringing huge amounts of high-burning fuel Why not mentioned this?
– Elon Musk (@elonmusk) April 23, 2019