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The document outlines how human-caused climate change affects different weather phenomena. It states that extreme heat, marine heat waves, and the intensity of heavy rain and hurricanes are increasing, while extreme cold is becoming less likely. It notes that while climate change increases hot, dry conditions contributing to droughts and wildfires, other factors like land use also play a role. For localized severe storms, the document explains that current climate models cannot yet accurately simulate specific events to make direct attribution statements.

In February 2025, U.S. temperature anomalies were split, with 92 cities warmer and 99 cooler than the 1991-2020 normal. Despite an average anomaly of -0.3°F and significant cold in the Northern Rockies and Plains, no city set a low temperature record for the month. Conversely, Phoenix, Arizona, recorded its hottest February on record. Analysis using the Climate Shift Index (CSI) indicates that temperatures in many cities remained warmer than they would have been without climate change, as more cities experienced days with positive than negative CSI values. Long-term trends show that 189 out of 191 analyzed stations have warmed since 1970, with Juneau, Alaska, being the fastest-warming station for February.

The briefing introduces 'hours-of-safety' to measure how long a home remains at a comfortable temperature after power is lost during extreme weather. It highlights the life-threatening risks of heat waves and polar vortexes, particularly for vulnerable populations in poorly insulated housing. The author advocates for passive design strategies—such as improved insulation, tighter envelopes, and cool roofs—combined with islandable solar PV and battery storage to increase passive survivability and community resilience.

The document outlines adaptation strategies for various climate-related health risks in Canada, including extreme temperature events, flooding, wildfires, food insecurity, vector-borne diseases, and water quality issues. It provides specific examples of municipal actions—such as Toronto's green roof bylaws and Vancouver's warming centres—and offers actionable tips for health professionals to support vulnerable patients and advocate for resilient community policies.

The April 2013 report 'Extreme Weather and Climate Change in the American Mind' reveals that 58% of Americans believe global warming is affecting U.S. weather. A significant majority (85%) reported experiencing extreme weather in the past year, with 37% stating they suffered moderate or great harm. While over half of Americans believe a natural disaster in their community is likely in the coming year, only 31% have a family emergency plan and 36% have a supply kit. Communication about these events remains primarily face-to-face or via phone, despite some use of social media.

The document outlines how climate change impacts Canadian health through extreme weather, food and water insecurity, and disease, while offering specific guidance for health professionals to mitigate these risks.