to increase during the summer months. Our second and third quarter revenues and results of operations typically reflect these seasonal trends.
Service or operational disruptions caused by severe storms, extended periods of inclement weather or climate events can significantly affect the operating results of the geographic areas affected. Extreme weather events may also lead to supply chain disruption and delayed project development, or disruption of our customers’ businesses, reducing the amount of waste generated by their operations.
Conversely, certain destructive weather and climate conditions, such as wildfires in the Western U.S. and hurricanes that most often impact our operations in the Southern and Eastern U.S. during the second half of the year, can increase our revenues in the geographic areas affected as a result of the waste volumes generated by these events. While weather-related and other event-driven special projects can boost revenues through additional work for a limited time, due to significant start-up costs and other factors, such revenue can generate earnings at comparatively lower margins.
Inflation
Macroeconomic pressures, including inflation and rising interest rates, and market disruption resulting in labor, supply chain and transportation constraints have impacted our results. Significant global supply chain disruption has reduced availability of certain assets used in our business and inflation has increased costs for the goods and services we purchase, particularly for labor, repair and maintenance, and subcontractor costs. Supply chain constraints have caused delayed delivery of fleet, steel containers and other purchases. Aspects of our business rely on third-party transportation providers, and such services have become more limited and expensive. We continue to take proactive steps to recover and mitigate inflationary cost pressures through our overall pricing efforts and by managing our costs through efficiency, labor productivity, and investments in technology to automate certain aspects of our business. These efforts may not be successful for various reasons including the pace of inflation, operating cost inefficiencies, market responses, and contractual limitations, such as the timing lag in our ability to recover increased costs under certain contracts that are tied to a price escalation index with a lookback provision.
Item 3. Quantitative and Qualitative Disclosures About Market Risk.
Except for the general financial institution instability that was publicly reported during the first quarter of 2023, as described further in Part II, Item 1A. Risk Factors, included in our Quarterly Report on Form 10-Q for the quarterly period ended March 31, 2023, the information about market risks as of September 30, 2023 does not materially differ from that discussed under Item 7A in our Annual Report on Form 10-K for the year ended December 31, 2022.
Item 4. Controls and Procedures.
Effectiveness of Disclosure Controls and Procedures
Our management, with the participation of our principal executive and financial officers, has evaluated the effectiveness of our disclosure controls and procedures (as defined in Rules 13a-15(e) and 15d-15(e) of the Securities Exchange Act of 1934, as amended) in ensuring that the information required to be disclosed in reports that we file or submit under the Securities Exchange Act of 1934, as amended, is recorded, processed, summarized and reported within the time periods specified in the SEC’s rules and forms, including ensuring that such information is accumulated and communicated to management (including the principal executive and financial officers) as appropriate to allow timely decisions regarding required disclosure. Based on such evaluation, our principal executive and financial officers have concluded that such disclosure controls and procedures were effective as of September 30, 2023 (the end of the period covered by this Quarterly Report on Form 10-Q) at a reasonable assurance level.
Changes in Internal Control over Financial Reporting
Management, together with our CEO and CFO, evaluated the changes in our internal control over financial reporting during the quarter ended September 30, 2023. We determined that there were no changes in our internal control over