Northampton Hazard Mitigation Plan (2020-2025) (PDF)- planning to mitigate against natural hazards (e.g., flooding, extreme weather events), including increases in storm and extreme weather events as a result of climate change. (Northampton's regulated floodplain is those areas with a 0.2% chance of flooding in any given year, the 500 year floodplain, as a surrogate for climate change.