A significant number of our properties are located in areas that are susceptible to earthquakes, tropical storms, hurricanes, tornadoes, wildfires, sea-level rise, and other natural disasters. As of December 31, 2018, 25% of the total insured value of our portfolio is located in the state of California, including a number of properties in the San Francisco Bay and Los Angeles areas. Additionally, 19% and 6% of the total insured value of our portfolio is located in the states of Florida and Texas, respectively. Recent intense weather conditions may cause property insurance premiums to increase significantly in the future. We recognize that the frequency and / or intensity of extreme weather events, sea-level rise, and other climatic changes may continue to increase, and as a result, our exposure to these events may increase. These weather conditions may disrupt our business and the business of our tenants, which may affect the ability of some tenants to pay rent and may reduce the willingness of tenants or residents to remain in or move to these affected areas. Therefore, as a result of the geographic concentration of our properties, we face risks, including higher costs, such as uninsured property losses and higher insurance premiums, and disruptions to our business and the businesses of our tenants.
We carry comprehensive liability, fire, flood, terrorism, rental loss, and environmental insurance for our properties with policy specifications and insured limits customarily carried for similar properties. Some types of losses, such as losses from named wind storms, earthquakes, terrorism, or wars may have limited coverage or be excluded from insurance coverage. Although we carry specific insurance coverage for named windstorm and earthquake losses, the policies are subject to deductibles up to 2% to 5% of the total insured value of each property, up to a $10 million maximum deductible per occurrence for each of these perils, with limits of $300 million per occurrence for all perils except earthquake, which has a total annual aggregate limit of $300 million. Terrorism coverage is limited to $200 million per occurrence related to property damage. Liability claims are limited to $151 million per occurrence. Should a loss occur at any of our properties that is subject to a substantial deductible or is in excess of the property or casualty insurance limits of our policies, we may lose part or all of our invested capital and revenues from such property, which may have a material adverse impact on our operating results, financial condition, and our ability to make distributions to stock and unit holders.
To the extent climate change causes adverse changes in weather patterns, our properties in certain markets may experience increases in storm intensity and rising sea-levels. Climate change may result in volatile or decreased demand for retail space at certain of our properties or, in extreme cases, our inability to operate certain properties at all. Climate change may also have indirect effects on our business by increasing the cost of insurance on favorable terms, or making insurance unavailable. Moreover, compliance with new laws or regulations related to climate change, including compliance with "green" building codes, may require us to make improvements to our existing properties or increase taxes and fees assessed on us or our properties. At this time, there can be no assurance that climate change will not have a material adverse effect on us.
Terrorist activities or violence occurring at our properties also may directly affect the value of our properties through damage, destruction or loss. Insurance for such acts may be unavailable or cost more resulting in an increase to our operating expenses and adversely affect our results of operations. To the extent that our tenants are affected by such attacks and threats of attacks, their businesses may be adversely affected, including their ability to continue to meet obligations under their existing leases.