JSFiddle - React, Tailwind, and code Playground

HTML

<div class="block">
    <div class="block-content">
        <h2>Title</h2>
        <p>Lorem ipsum dolor sit amet, consectetur adipiscing elit.</p>
    </div>              
    <div class="block-content">
        <h2>Title</h2>
        <p>Lorem ipsum dolor sit amet, consectetur adipiscing elit. Nulla tincidunt turpis vel libero aliquet tristique. Quisque quam lacus, fringilla rutrum iaculis ultricies, scelerisque laoreet mauris. Fusce a dapibus odio.</p>
    </div>
    <div class="block-content">
        <h2>Title</h2>
        <p>Lorem ipsum dolor sit amet, consectetur adipiscing elit. Nulla tincidunt turpis vel libero aliquet tristique. Quisque quam lacus.</p>
    </div>
</div>

CSS

.block { width:100%; }

.block-content {
    background:#CCC;
    float:left;
    margin-left:3%;
    width:27%; }

.block-content p { background:red; }

JavaScript

function setTheHeight() {

    if( $('.block .block-content').length ) {
        //Get value of highest element
        var maxHeight = Math.max.apply(Math, $('.block .block-content').map (
            function() {
                return $(this).height();
            }
        ));
        console.log(maxHeight);
        $('.block .block-content').height(maxHeight);
    }   
}

setTheHeight();

$(window).resize(function() {
    setTheHeight();
});