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Climate Adaptation

Our weather is becoming not only more extreme, but unpredictable. In 2023, San Antonio experienced 75 days with temperatures over 100 degrees. Learn why adaptation matters. 

Good Health and Well-Being
Reduced Inequalities
Climate Action

Why Adaptation Matters

Our Risks

The vision for San Antonio’s future is that of a resilient city, meaning a city that can maintain normal function in response to external stresses and disruptions, specifically those from climate change. One of the first exercises for SA Climate Ready was a vulnerability and risk assessment that examined how the projected changes in temperature, precipitation, and extreme weather will impact different parts of our community. That process helped us identify the populations at highest risk and community systems that will need to be addressed through the actions identified in the plan, listed below.


  1. Increased exposure and risk of injury to vulnerable groups from heatwaves
  2. Increased impacts from high ozone concentrations
  3. Increased infrastructure damage from wildfires


  1. Increased injury and mortality at low water crossings
  2. Increased exposure and risk of injury to vulnerable groups from precipitation
  3. Increased infrastructure damage from precipitation
  4. Increased occurrence of vector-borne diseases
  5. Increased need for waste and debris management
  6. Reduced local food security from reduced production
  7. Reduced abundance and health of native species and ecosystems
  8. Increased mobility disruption for residents and City staff
  9. Increased need for emergency management resources.

Reduced Inequalities
Good Health and Well-Being

Urban Heat

Warmer Nights

With a changing climate, we can also expect more nights over 80 degrees as higher levels of humidity will hold more of the heat that builds up in the daytime. At the current rate of change, we can expect 80+ degree nights to be the average rather than an extreme.

Warmer nights will mean that our most vulnerable residents will not be able to escape the heat of the day as they have in the past. Air conditioning will continue to run throughout the night for a greater part of the year, placing a larger burden on our energy supply.

warm summer nights graph showing the average low temperature increasing between 1970 and 2018

Urban Heat

SA Heat Maps

Learn about the City's urban heat island initiatives, explore interactive maps, and prepare for summer.

Industry, Innovation, and Infrastructure
Sustainable Cities and Communities

Urban Heat

Cool Pavement Reduces Urban Heat Island Effect

San Antonio can get hot. Some parts of the city, especially those with a lot of buildings and roads but not much natural shade, can get even hotter – sometimes, by as much as 20 degrees!

This is called the “urban heat island” effect.

The asphalt used to pave roads traps heat and releases it at night, making a hot city even hotter.


The water-based asphalt treatment known as cool pavement reflects more sunlight and absorbs less heat, thereby reducing spikes in temperature at night. It’s safe to use, containing no harmful chemicals, enhances the life of the pavement, and is compatible with traditional asphalt. Cool pavement looks different, too – it’s lighter and grayer in color.

In 2021, the City of San Antonio became the first city in Texas to fight heat with the treatment, testing it on a small stretch of asphalt at the east end of the Hays Street Bridge. In 2023, the City is expanded its initiative, applying cool pavement treatments -- GuardTop, PaveTech, GAF and SealMaster -- to sections of roadway in all 10 Council Districts.

Find out more about cool pavement and view the projects locations here on the Public Works Cool Pavement Program page.

For more information, check out the latest reports:

Cool Pavement Testing Report (02/12/2024)

San Antonio Cool Pavement Report (02/08/2024)

Climate Action
Good Health and Well-Being

Urban Heat

Heat and Air Quality

San Antonio has made great progress on improving local air quality, in particular reducing ground-level ozoneOur ability to control ozone levels through pollution reduction will be challenged as extreme heat days create better conditions for ground level ozone to form.

Persistent exposure to poor air quality is a chronic stressor for some communities which creates vulnerability to other kinds of threats, including worse outcomes associated with COVID-19.  The risk associated with the combination of heat and poor air quality is a critical reason why San Antonio is working to reduce emissions and prepare for climate impacts to improve public health and overall community resilience.    

ozone in the low zone graphic. Pollution + Heat & sunlight = ozone.
Reduced Inequalities

Urban Heat

Protecting Vulnerable Populations

One way to reduce vulnerability is to reduce exposure to impacts like heat waves with cooling centers. The City of San Antonio has 52 locations of cooling centers around the region. The other way is to take care of the underlying health stresses some members of our community face.

San Antonio’s Mobile Integrated Healthcare program is one way that we’re reaching into the community proactively to improve health and wellness among our most vulnerable populations to help them better manage all kinds of threats, including those posed by climate change.

a person holding medical equipment resting on the hood of a white car.

Urban Heat

City Cooling Centers

One of the best ways we can prevent heat related illness and protect public health is to provide accessible public cooling centers.  That's why the City of San Antonio has opened cooling centers around town for residents to access.

Use the map embedded here to find a cooling center near you and find all the cooling resources provided by San Antonio Emergency Management on the Beat the Heat program website.

A flooded street with cars underwater and people in small boats along road signs
Climate Action

Precipitation Changes

Flooding Risk

Overall, San Antonio is expected to have lower total precipitation, which will strain our water supply, natural ecosystems, and agriculture.

On the other hand, we expect that individual storm events will drop higher volumes of water, leading to increased flooding risk for many residents. For example, the likelihood of a 2-inch+ rainfall event is expected to increase from 50% in any year to 80% by the end of the century.

Climate Action
Partnerships for the Goals
Good Health and Well-Being

Precipitation Changes

High Water Safety

San Antonio has many streams and drainage areas that are close to roadways and even small rain events can cause water to overtop the road, creating dangerous conditions for drivers.

Bexar County has invested in a network of sensors in known trouble areas to detect whether a road should be closed for high water. If you are unsure if a road may be closed, check real-time information on the interactive HALT map.

It only takes 12 inches of water to sweep a car off the road, so when you see water on the road; Turn Around, Don’t Drown!

HALT graphic. High water. Alter. Lifesaving. Technology.
Dry brown fields

Drought impact on a stock pond near Kurten, Texas, in 2011. Photo credit: John Nielson-Gammon

Climate Action
Decent Work and Economic Growth
Sustainable Cities and Communities

Precipitation Changes


Four of the 12 major risks identified in The San Antonio 2019 Vulnerability Assessment are drought related. The direct impact of low water availability is what comes to mind immediately, but drought conditions can lead to widespread vegetation die off which poses both debris management challenges as well as wildfire risk.

Lack of water reduces agricultural productivity and strains natural ecosystems which can increase contact between people and wildlife looking for water. Additionally, stagnant disconnected pools become active breeding grounds for potentially disease-carrying mosquitos.

Being Climate Ready

Climate Ready Neighborhoods

Climate Ready Neighborhoods is a network of community partners linking climate-resilience information, trainings, resources, and funding through a network of trusted community groups and spaces called Neighborhood PODs.

Climate Ready Neighborhoods Network is here to support community-based organizations who in turn support their community as Neighborhood PODs. Whether you are a Neighborhood Association, a community-minded business, a House of Worship, a nonprofit or any other type of involved and committed neighbor — This process is built for you to find the right fit to Build Climate Resilience and Increase Equity and Access to Resources alongside Neighbors in your Community.

With equitable access for all, Climate Ready Neighborhoods connects Neighborhood PODs through Information, Resources and Partnership to increase climate resilience before, during and after the storms of life

Fill out the interest form to join the network. 

Apply for a $5,000 Microgrant to test or expand a project for your POD.

Use the Climate Reach Neighborhoods Toolkit - Module 1 exercises to assess your current capacity and define learning goals and community outcomes to build climate readiness.

an infographic explaining each of the 3 POD types; Communications, Shelter, and Resource

click to enlarge this image

Good Health and Well-Being
Sustainable Cities and Communities

Being Climate Ready

Resources to Stay Safe

Besides staying cool, there are a number of resources available to help each San Antonian stay ready for the challenges of a changing climate.

Find resources to protect life and property from increasing wildfire risk
Learn what to do before, during, and after a flood
Stay informed of critical emergency notifications from AlertsSA
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