Why 2030? CO2 persists in the atmosphere for hundreds of years. This doesn't end in 2030.
The goal is not to generate hysteria; but to avoid it. Hitting one or more tipping points [1] is orders of magnitude more destructive than prioritising phasing out fossil fuels, and impossible to undo.
But I do understand that some people have reasons not to care about impacts that have an outsized effect on future generations, so to your request: a recent example of a list of impact predictions is the UK Government joint intelligence committee's national security assessment [2].
[1] https://en.wikipedia.org/wiki/Tipping_points_in_the_climate_...
[2] https://www.gov.uk/government/publications/nature-security-a...