try_remove_disaster_vars_effect

try_remove_disaster_vars_effect = {
	if = {
		limit = {
			NOT = {
				any_character_situation = {
					tgp_natural_disaster_situation_is_disaster_trigger = yes
				}
			}
		}
		if =  {
			limit = { has_diarchy_type = temporary_regency }
			end_diarchy = yes
		}
		remove_variable = natural_disaster_received_first_warning
		remove_variable = natural_disaster_5102_count
		if = {
			limit = { has_variable = natural_disaster_contribution_discount }
			remove_variable = natural_disaster_contribution_discount
		}
	}
}

As written in game/common/scripted_effects/10_dlc_tgp_natural_disaster_scripted_effects.txt.