Ameren Missouri is encouraging natural gas conservation during this extended cold period. Due to the winter storms and low temperatures across the Midwest, the demand for natural gas has been peaking. Pam Harrison, director of gas operations for Ameren Missouri says the prudent use of natural gas will also help customers save money during this extended cold period. Tips to reduce natural gas usage: set your thermostat as low as is comfortable and turn down the temperature of your water heater to the warm setting.