Next Step In Forcing Governments To Fight Climate Change

In the 80s and 90s the environmental call was to make people aware what was coming if we didn't change our ways but i was always optimistic that once people realised the trouble we're in they would do whatever they possibly could to mitigate climate change.
I imagined it would be universal and Global Governments would all work together in a similar way to how they did in the late 1980s to protect the Earth's ozone layer by phasing out ozone-depleting substances emitted by human activities.
Here we are now in the 2020's and its getting hotter thanks to man made climate change where in the 1980's CO2 where 338-339 parts per million (ppm), they have continued grow to over 422 ppm today and actually increased from roughly 1.6 ppm per year in the 1980s to over 2.6 ppm per year in the last decade.
Climate scientists are saying that the current Australian heatwave with the heat reaching record-breaking temperatures of close to 50C, was five times more likely to occur thanks to man made Climate Change so weather warnings get louder, weather maps get redder yet they are somehow ignored.
We can take action individually but to make wholesale change it is going to take work at the Government level so what will it take for the dishonest, greedy and selfish politicians who continue to accept donations from fossil fuel companies, and therefore put their interests above its citizens?
It is unlikely that even whole cities burning or a planet wide drought causing a series of weather-related crop failures will focus minds because the 2.5 million annual deaths from air pollution, over 546,000 yearly deaths from heat exposure and 154,000 from wildfire smoke are not causing pause for thought so maybe we should start holding our governments to account for the scale and the climate related deaths.
Surely that is the next step, for families who have lost loved ones in the increasing number of fires, extreme hot heat, floods and other climate change induced disasters, to start suing the politicians who keep green washing their policies, approving new fossil fuel projects and continuing policies that add to the emissions that cause climate change, instead of doing everything that they can possibly do to introduce policies to cut emissions and fight climate change.   
If the laws we currently have cannot make people responsible, perhaps we need new laws. And if our politicians won't legislate them, perhaps we need different politicians.